How should reference characters be used in patent drawings?
Reference characters in patent drawings should be used according to the following guidelines from 37 CFR 1.84(p): Use Arabic numerals, preferably in the clockwise direction and starting with the number 1 Use plain legible symbols and characters Must measure at least 0.32 cm (1/8 inch) in height Should not be placed upon hatched or shaded…
Read MoreHow should conventional features be illustrated in patent drawings?
According to MPEP 608.02(d), conventional features in patent drawings should be illustrated as follows: Use graphical drawing symbols Use labeled representations (e.g., a labeled rectangular box) The MPEP states: However, conventional features disclosed in the description and claims, where their detailed illustration is not essential for a proper understanding of the invention, should be illustrated…
Read MoreHow should improvements on existing inventions be illustrated in patent drawings?
When illustrating improvements on existing inventions, patent drawings should follow specific guidelines as outlined in MPEP 608.02(d): Show the improved portion disconnected from the old structure In a separate view, show only enough of the old structure to demonstrate the connection with the improvement The MPEP cites 37 CFR 1.83(b): When the invention consists of…
Read MoreWhat is required for modifications described in a patent application?
All modifications described in a patent application must be illustrated in the drawings, or the text describing those modifications must be canceled. This requirement is based on Ex parte Peck, 1901 C.D. 136, 96 OG 2409 (Comm’r Pat. 1901). The MPEP section 608.02(f) states: “All modifications described must be illustrated, or the text canceled.” However,…
Read MoreWhen should prior art figures be included in a patent application?
Generally, prior art figures are discouraged in patent applications. As stated in MPEP 608.02(g), Figures showing the prior art are usually unnecessary and should be canceled. This principle is based on the decision in Ex parte Elliott, 1904 C.D. 103, 109 OG 1337 (Comm’r Pat. 1904). However, there are exceptions to this rule. The MPEP…
Read MoreWhat happens if drawings submitted in a patent application are marked as ‘informal’?
If drawings submitted in a patent application are marked as ‘informal’ but are considered acceptable by the Office of Patent Application Processing (OPAP), the examiner will not require replacement of the drawings. As stated in the MPEP: If the drawings submitted in an application have been indicated by the applicant as “informal,” but the drawings…
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