US3138262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slotted bookshelf and book support
Assignee: Unisys Corp
•
Filing: 1959-01-30
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Granted: 1964-06-23
•
Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Walter G Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:51
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/58; A47B57/583
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
IN COMBINATION, A SHELF HAVING MEANS FOR ATTACHMENT TO A FRAMEWORK, AND A COMPRESSOR FOR SAID SHELF, SAID SHELF HAVING SUBSTANTIAL THICKNESS AND HAVING A CENTRAL LONGITUDINAL SLOT EXTENDING OVER SUBSTANTIALLY ITS ENTIRE LENGTH, A PAIR OF MUTUALLY OPPOSED TRACK ELEMENTS DISPOSED LONGITUDINALLY OF SAID SLOT AND WHOLLY INTERMEDIATE THE THICKNESS OF SAID SHELF, SAID COMPRESSOR HAVING PAIRS OF TRACK ELEMENT ENGAGING MEANS WHICH ARE SPACED APART AND ADAPTED TO LOOSELY ENGAGE SAID TRACK ELEMENTS, SAID TRACK ELEMENTS TERMINATING SHORT OF THE LENGTH OF SAID SLOT WHEREBY SAID COMPRESSOR MAY OCCUPLY ALTERNATIVELY A POSITION EXTENDING UPWARDLY FROM SAID SHELF OR DEPENDING DOWNWARDLY FROM SAID SHELF WITH SAID SPACED TRACK ENGAGING ELEMENTS IN OPERATIVE ENGAGEMENT WITH SAID TRACK ELEMENTS AND WITHOUT INTERFERING WITH BOOKS RESTING ON SAID SHELF OR EXTENDING UP TO SAID SHELF FROM BENEATH.
References Cited (Backward Citations)
US525186A
Cited
US1335446A
Cited
US2264017A
Cited
US2261840A
Cited
US2684765A
Cited
US2688504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |