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US2880772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work-holding device
Assignee: Individual
•
Filing: 1955-10-04
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Granted: 1959-04-07
•
Expires: 1975-10-04
Abstract
No abstract record available.
Inventors
- 👤 Charlie J Polchow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:50
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/34; Y; Y10; Y10S; Y10S269/00; Y10S269/901; Y10S269/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451919A
Cited
US600100A
Cited
US684097A
Cited
US1719136A
Cited
US1688533A
Cited
US2162294A
Cited
US2233725A
Cited
US2467866A
Cited
US2599010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |