How do I show microfluidic channels that are too small to draw?

Use the enlarged-detail convention: draw the full chip in plan view as FIG. 1, circle the functional region, and present it enlarged as FIG. 1A (and FIG. 1B for a section). The claim recites geometry the enlarged view makes legible — without it, the disclosure is a line.

Do assay methods need figures at all?

If a method claim recites steps, a flowchart whose numbered steps mirror the claim language is the standard support, and examiners expect one. Keep it separate from the device figure rather than overlaying protocol arrows on the chip.

Can I file gel images or fluorescence micrographs as figures?

Generally no — utility drawings must be black-and-white line art, and photographs are accepted only when a drawing cannot show the invention. Treat the micrograph as the reference and file a line-art redraw of the relevant structure; keep the raw data for the specification or declarations as your attorney advises.

Where do DNA or protein sequences go?

In the formal sequence listing, under the office’s sequence rules — not drawn into figures. A figure may reference SEQ ID NOs, but rendering the sequence as artwork satisfies neither the listing requirement nor the drawing rules.

Can PatentFig AI work from photos of our prototype cartridge?

Yes — upload the photo and it is redrawn as compliant line art with reference numerals, with bench clutter removed. The same applies to CAD exports of the instrument and microscope images of the chip.

How are layered chip cross-sections hatched?

Each material in the section — glass, PDMS, membrane, adhesive — gets a visually distinct hatching pattern, consistent across every figure. Adjacent layers must never share a pattern, or the bonded-layer boundary the claim depends on disappears.

Biotech Patent Drawings

Biotech figures split between the device and the method — a microfluidic chip you can draw and an assay you can only flowchart. The set works when each claim type gets its figure and the bench photos stay out of the filing.

Open the generator See output examples

Microfluidic plan + detail views
Assay method flowcharts
Instrument line art
FIG. 1A detail conventions

The 30-second answer

Apparatus claims → a plan (top) view of the chip or cartridge plus enlarged partial views and cross-sections of the functional region, in the FIG. 1, FIG. 1A convention.
Assay and method claims → flowcharts with numbered steps that mirror the claim language; instrument claims → perspective line art with numbered modules.
Keep sequences in the sequence listing and convert bench photos to line art — then run the set through the checker before filing.

Biotech figure examples

Each example is a fictional invention. Open one to pre-fill the generator with the prompt.

Which figures support which claims

Biotech claims split between apparatus and method — match each to its figure type.

Device claims → plan views with enlarged details

The chip or cartridge in top view as FIG. 1, with the functional region — mixing junction, reaction chamber — enlarged as FIG. 1A so channel geometry is actually legible.

Device claims → cross-sections through the channel

A section through the bonded layers showing channel depth, membrane, and substrate with distinct hatching per material.

Assay and method claims → flowcharts

Sample prep, amplification, detection, and analysis as numbered steps that mirror the claim — the standard support for a method-of-detection claim.

Instrument claims → perspective line art

The benchtop instrument as clean perspective line work with numbered modules: stage, optics, fluidics, controller — converted from CAD or photo, never filed as a photo.

System claims → block diagrams

Instrument, cartridge interface, controller, and analysis software as labeled blocks when the claim spans hardware and processing.

Biotech drawing mistakes that cost office actions

The failure patterns specific to life-science figures.

Microscale features with no enlarged view

A 100 µm channel drawn at full-chip scale is an invisible line. If the claim recites channel geometry, an enlarged partial view (FIG. 1A) is not optional.

Method and device mixed in one figure

Arrows of protocol steps drawn over the chip plan view make both disclosures ambiguous. Give the method its own flowchart and let the device figure stay structural.

Sequence content drawn into figures

Nucleotide and amino acid sequences belong in the formal sequence listing. A sequence rendered as figure art does not satisfy listing rules and clutters the drawing set.

Stained photos filed as figures

Gel images, fluorescence micrographs, and stained sections are grayscale photographs — objection material in a utility filing absent special justification. Redraw the relevant structure as line art.

Outsourcing biotech figures vs. PatentFig AI

Microfluidics and instruments are specialist territory for illustrators — which shows in the rates.

Drawing service

PatentFig AI

Plan + detail + section sets

Each view billed separately

Generated as a consistent set

Assay flowcharts

Often a second vendor or queue

Same workspace as the device figures

Photo-to-line-art conversion

Manual redraw at specialist rates

Upload the photo, get line art

Protocol revisions

$50–$100 per round, days each

Chat edits, same day

Compliance check

Depends on the vendor

Built-in checker for six offices

Typical set cost (6–10 figures)

$600–$2,500

$50/mo · 500 credits · ~50 figures (~$1 each)

PatentFig AI is the better fit when

Chips and cartridges need plan views, enlarged details, and sections in one consistent set
Assay methods need flowcharts renumbered as claims are amended
Inputs are CAD exports, microscope images, or whiteboard protocol sketches
The family files across USPTO, EPO, CNIPA, JPO, or KIPO

Other channels fit better when

The disclosure is sequence data — that belongs in the sequence listing, not figures
Experimental data plots must be reproduced exactly as recorded
A litigation-grade set needs a specialist’s certification

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