Patent US2620929A successfully refreshed from Google Patents.
US2620929A
Expired / Lapsed
US
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Multipurpose bookrack
Assignee: Individual
•
Filing: 1950-04-10
•
Granted: 1952-12-09
•
Expires: 1970-04-10
Abstract
No abstract record available.
Inventors
- 👤 Robert J Sportsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:20
CPC Classifications
A; A47; A47B; A47B65/00; A47B65/10; A47B65/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US518573A
Cited
US849298A
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US986069A
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US1049726A
Cited
US1379766A
Cited
US1472820A
Cited
US2134606A
Cited
US2510077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |