US3216377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bookstacks
Assignee: Unisys Corp
•
Filing: 1962-10-22
•
Granted: 1965-11-09
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Donald A Gunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:23
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A BOOKSTACK, (A) A PLURALITY OF SPACED VERTICAL UPRIGHT MEMBERS, (B) A PLURALITY OF PAIRS OF SPACED VERTICAL END BRACKETS, (C) EACH END BRACKET OF A SAID PAIR OF END BRACKETS DETACHABLY MOUNTED ON ADAJCENT UPRIGHT MEMBERS, (D) A PLURALITY OF HORIZONTAL SHELVES DISPOSED BETWEEN SELECTED ADJACENT UPRIGHT MEMBERS, (E) EACH SHELF HAVING OPPOSITE END PORTIONS ATTACHED TO A PAIR OF SAID SPACED END BRACKETS, (F) A PREDETERMINED NUMBER OF SAID SHELVES ARRANGED IN SUBSTANTIAL COPLANAR RELATIONSHIP, (G) PROTUBERANCES FORMED ON SAID END BRACKETS OF SAID PREDETERMINED NUMBER OF SHELVES AND EXTEND-
Claim 2
Dependent Claim
93 words
IN A BOOKSTACK, (A) A PLURALITY OF SPACED VERTICAL UPRIGHT MEMBERS, (B) A PLURALITY OF PAIRS OF SPACED VERTICAL END BRACKETS, (C) EACH END BRACKET OF A SAID PAIR OF END BRACKETS DETACHABLY MOUNTED ON ADAJCENT UPRIGHT MEMBERS, (D) A PLURALITY OF HORIZONTAL SHELVES DISPOSED BETWEEN SELECTED ADJACENT UPRIGHT MEMBERS, (E) EACH SHELF HAVING OPPOSITE END PORTIONS ATTACHED TO A PAIR OF SAID SPACED END BRACKETS, (F) A PREDETERMINED NUMBER OF SAID SHELVES ARRANGED IN SUBSTANTIAL COPLANAR RELATIONSHIP, (G) PROTUBERANCES FORMED ON SAID END BRACKETS OF SAID PREDETERMINED NUMBER OF SHELVES AND EXTEND-
References Cited (Backward Citations)
US1806642A
Cited
US781060A
Cited
US1739809A
Cited
US2005593A
Cited
US2693884A
Cited
US2772846A
Cited
US2803351A
Cited
US2909353A
Cited
US2907471A
Cited
US3088424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |