US4586730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clipboard
Assignee: SHEL INDUSTRIES Inc
•
Filing: 1984-05-30
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Granted: 1986-05-06
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Expires: 2004-05-30
Abstract
Abstract A clipboard comprising a generally rectangular flat board for supporting a sheet of writing material, a clamp at the upper end of the board for holding the sheet of writing material and a flange extending outwardly from one edge of the board and having an aperture adapted to receive a users thumb for the purpose of holding the clipboard. The invention also consists of a clipboard having clamping means which consist of a roller mounted for rotation on support means at the top of the board for clamping a sheet of writing material to the board and for advancing the sheet along the upper surface of the board.
Inventors
- 👤 Lev Shulyak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:22
CPC Classifications
B; B43; B43L; B43L5/00; B43L5/02; B42; B42D; B42D19/00; B42F; B42F9/00; B42F9/001
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
Clipboard comprising: (a) a generally rectangular flat board having a top edge, a bottom edge, a first side edge, and a flat upper surface for supporting a sheet of writing material, (b) a clamp mounted on the top surface at the upper end of the board for holding the sheet of writing material on said surface, (c) an outwardly extending flange having a second side edge which is opposite said first side edge and having an aperture adapted for receiving a user's thumb for holding the clipboard, said second side edge and said aperture being substantially outside of the area of said upper surface which extends between said top and bottom edges and, (d) a hold-down bar which is removably attached to said clipboard so that it extends from said aperture to the opposite side edge of said clipboard.
Claim 2
Dependent Claim
139 words
Clipboard comprising: (a) a generally rectangular flat board having a top edge, a bottom edge, a first side edge, and a flat upper surface for supporting a sheet of writing material, (b) a clamp mounted on the top surface at the upper end of the board for holding the sheet of writing material on said surface, (c) an outwardly extending flange having a second side edge which is opposite said first side edge and having an aperture adapted for receiving a user's thumb for holding the clipboard, said second side edge and said aperture being substantially outside of the area of said upper surface which extends between said top and bottom edges and, (d) a hold-down bar which is removably attached to said clipboard so that it extends from said aperture to the opposite side edge of said clipboard.
Claim 3
Dependent Claim
11 words
Clipboard as recited in claim 1, wherein said aperture is eliptical.
Claim 4
Dependent Claim
22 words
Clipboard as recited in claim 1, wherein a second aperture is located in said flange and is spaced from the first aperture.
Claim 5
Dependent Claim
19 words
Clipboard as recited in claim 1, wherein a pencil holder is located on said top surface adjacent the clamp.
Claim 6
Dependent Claim
25 words
Clipboard as recited in claim 1, wherein said clamp comprises roller means for clamping and advancing the sheet of writing material along said upper surface.
Claim 7
Dependent Claim
26 words
Clipboard as recited in claim 1, wherein said upper surface consists of substantially white plastic adapted for being written on by a conventional erasable grease pencil.
Claim 8
Dependent Claim
78 words
Clipboard as recited in claim 1, wherein said bar comprises: (a) an elongated straight portion adapted to extend across the surface of the clipboard from the aperture to said opposite side edge, (b) a first leg portion at one end of said straight portion which is adapted to engage the inner edge of said aperture, and (c) a second leg portion at the opposite end of said straight portion which is adapted to engage said opposite side edge.
Claim 9
Dependent Claim
33 words
Clipboard as recited in claim 7, wherein said bar is made of a resilient material and said first and second leg portions are curved and engage their respective edges in a snap fit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |