US2833165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain saw filing device
Assignee: Individual
•
Filing: 1956-03-06
•
Granted: 1958-05-06
•
Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 John W Irwin
- 👤 Lillian J Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:55
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/16; B23D63/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US527332A
Cited
US566003A
Cited
US1024387A
Cited
US758551A
Cited
US934510A
Cited
US1165248A
Cited
US2427412A
Cited
US2505278A
Cited
US2755559A
Cited
US2762241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |