Patent US2633761A successfully refreshed from Google Patents.
US2633761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable chain saw filing device
Assignee: Individual
•
Filing: 1951-05-15
•
Granted: 1953-04-07
•
Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Butts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:55
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/16; B23D63/162; Y; Y10; Y10T; Y10T29/00; Y10T29/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US346541A
Cited
US537827A
Cited
US1754378A
Cited
US1852276A
Cited
US1900084A
Cited
US2323527A
Cited
US2484417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |