How to write a provisional patent application yourself

What a provisional actually buys you

• A filing date you can claim for the next twelve months.
• The legal right to say 'patent pending' on your product, sell sheet and website.
• Time to test the market, quote factories and talk to buyers before spending on a full utility patent.
• Nothing is examined — but nothing is protected beyond what you actually described, so detail matters.

Section 1 — Title of the invention

Plain and functional, not a brand name. 'Teetering ring toss target apparatus' beats 'Teeter Toss'. Six to fifteen words describing the thing itself.

Section 2 — Field and background

One short paragraph naming the field, then two or three paragraphs on the problem that exists today. Describe what current products do badly. Do not attack any competitor by name and do not overstate — you are setting up why your solution matters.

Section 3 — Summary of the invention

Three to six paragraphs explaining the invention in ordinary language: what it is, what it does, what the main parts are and what advantage it delivers. Use 'in one embodiment' when you describe a specific version, so you are not locked into it.

Section 4 — Drawings

• Black and white line drawings, one view per page: perspective, side, top, exploded and any moving state.
• Number every part (100, 110, 120…) and keep those numbers identical in the text.
• Hand drawings are legally acceptable if they are clear — a ruler and a fine black pen are enough.
• Add a short figure list: 'FIG. 1 is a perspective view of the apparatus.'

Section 5 — Detailed description (the part that matters)

Walk through every part by number, what it is made of, how it connects, how it moves and what dimensions it may range across. Use ranges rather than fixed numbers — 'approximately 8 to 14 inches' protects far more ground than '11 inches'.

Then describe alternatives: other materials, other shapes, other ways to achieve the same function. Anything you fail to describe is something you cannot claim later.

Filing it with the USPTO

• Register for a free USPTO.gov account and use Patent Center to file electronically.
• Attach your specification PDF, drawings PDF, cover sheet (form SB/16) and micro-entity certification (SB/15A) if you qualify.
• Pay the fee — roughly $60 at micro-entity rate — and save the confirmation and application number.
• From that moment you are patent pending, for twelve months, with no extensions.

Common mistakes that make a provisional worthless

• Describing only one version of the invention.
• Vague functional language with no structure ('a mechanism that holds the ring').
• Drawings whose part numbers do not match the text.
• Adding new features to the product after filing and never filing an updated provisional.
• Letting the twelve months lapse without filing the utility application.