Patent US4501438A successfully refreshed from Google Patents.
US4501438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clipboard
Assignee: Individual
•
Filing: 1981-07-16
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Granted: 1985-02-26
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Expires: 2001-07-16
Abstract
Abstract A flat and generally rectangular clipboard is provided with a pair of integral L-shaped spring members that are normally coplanar with the remainder of the board but may be flexed into raised and tensioned positions to hold sheet materials upon the top surface of the board.
Inventors
- 👤 Robert G. McKee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:18
CPC Classifications
B; B42; B42F; B42F9/00; B42F9/001; B43; B43L; B43L3/00; B43L5/00; B43L5/02; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T24/205; Y10T24/206; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24777
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A clipboard comprising a flat and generally rectangular board of substantially rigid but flexible, spring-like material; said board having cutouts along one edge thereof defining a pair of integral L-shaped spring members normally flush with the remainder of said board; each of said L-shaped members having a first leg portion extending along said one edge and an elongated second leg portion projecting into said board away from said one edge; said elongated second leg portion having a length within the range of about 1.5 to 2.5 inches; said second leg portion providing an undersurface engagable with sheet materials supported upon said board for holding said sheet materials in place.
Claim 2
Dependent Claim
109 words
A clipboard comprising a flat and generally rectangular board of substantially rigid but flexible, spring-like material; said board having cutouts along one edge thereof defining a pair of integral L-shaped spring members normally flush with the remainder of said board; each of said L-shaped members having a first leg portion extending along said one edge and an elongated second leg portion projecting into said board away from said one edge; said elongated second leg portion having a length within the range of about 1.5 to 2.5 inches; said second leg portion providing an undersurface engagable with sheet materials supported upon said board for holding said sheet materials in place.
Claim 3
Dependent Claim
25 words
The clipboard of claim 1 in which said first leg portion provides a stop element for limiting upward movement of sheet materials upon said board.
Claim 4
Dependent Claim
22 words
The clipboard of claim 1 in which said first leg portions of the respective L-shaped members extend outwardly away from each other.
Claim 5
Dependent Claim
22 words
The clipboard of claim 3 in which said second leg portions of the respective L-shaped members are generally parallel with each other.
Claim 6
Dependent Claim
21 words
The clipboard of claims 1, 3, or 4 in which said L-shaped members are located adjacent the corners of said board.
Claim 7
Dependent Claim
14 words
The clipboard of claim 1 in which the undersurface of said board is roughened.
Claim 8
Dependent Claim
15 words
The clipboard of claim 1 in which said board is formed integrally of polymeric material.
References Cited (Backward Citations)
US818130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |