US2803293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring assembly
Assignee: Individual
•
Filing: 1953-10-12
•
Granted: 1957-08-20
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 David L Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:48
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1423065A
Cited
US1718386A
Cited
US2247543A
Cited
US2276516A
Cited
US2415765A
Cited
US2459758A
Cited
FR991792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |