Patent US3821936A successfully refreshed from Google Patents.
US3821936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee desk
Assignee: Individual
•
Filing: 1972-10-31
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Granted: 1974-07-02
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Expires: 1992-10-31
Abstract
Abstract A clip board has pivotally secured at one end a wire form shaped to the contour of a leg. The form, when not in use, folds against the board. When in use the form folds out at an angle of about 90*.
Inventors
- 👤 J Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:40
CPC Classifications
A; A47; A47B; A47B23/00; A47B23/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
In combination: A CLIP BOARD; A KNEE RECEIVING FRAME COMPRISING A SINGLE LENGTH OF PLASTIC COATED WIRE; SAID WIRE HAVING A CENTRAL INTURNED LOOP TO RECEIVE THE KNEE; SAID WIRE HAVING OPPOSITE ENDS EXTENDING TRANSVERSELY INTO OPENINGS IN OPPOSITE SIDES OF THE BOARD AND PIVOTED THEREIN; THE BOTTOM OF THE BOARD HAVING A GROOVE SHAPED TO RECEIVE THE LOOP AND CENTRAL PORTION OF THE WIRE; SAID FRAME EXTENDING OUTWARD AT RIGHT ANGLES TO THE BOARD WHEN IN USE; SAID FRAME BEING FOLDED AGAINST THE BOTTOM OF THE BOARD AND FITTING INTO SAID GROOVE WHEN NOT IN USE, AND HELD IN THE FOLDED POSITION BY A ROTATABLE CLIP.
Claim 2
Dependent Claim
107 words
In combination: A CLIP BOARD; A KNEE RECEIVING FRAME COMPRISING A SINGLE LENGTH OF PLASTIC COATED WIRE; SAID WIRE HAVING A CENTRAL INTURNED LOOP TO RECEIVE THE KNEE; SAID WIRE HAVING OPPOSITE ENDS EXTENDING TRANSVERSELY INTO OPENINGS IN OPPOSITE SIDES OF THE BOARD AND PIVOTED THEREIN; THE BOTTOM OF THE BOARD HAVING A GROOVE SHAPED TO RECEIVE THE LOOP AND CENTRAL PORTION OF THE WIRE; SAID FRAME EXTENDING OUTWARD AT RIGHT ANGLES TO THE BOARD WHEN IN USE; SAID FRAME BEING FOLDED AGAINST THE BOTTOM OF THE BOARD AND FITTING INTO SAID GROOVE WHEN NOT IN USE, AND HELD IN THE FOLDED POSITION BY A ROTATABLE CLIP.
References Cited (Backward Citations)
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |