US2798718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canister spring
Assignee: Individual
•
Filing: 1951-10-26
•
Granted: 1957-07-09
•
Expires: 1971-10-26
Abstract
No abstract record available.
Inventors
- 👤 William E Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:19
CPC Classifications
A; A62; A62B; A62B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US617177A
Cited
US1275396A
Cited
US1501286A
Cited
FR693959A
Cited
US1961438A
Cited
US1995116A
Cited
US2225990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |