US2877581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: U O COLSON CO
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Filing: 1956-11-05
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Granted: 1959-03-17
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Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 Cecil B Woofter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:39
CPC Classifications
B; B42; B42D; B42D5/00; B42D5/04; B42D5/046; B42D5/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1159801A
Cited
US1366604A
Cited
US1662906A
Cited
FR729232A
Cited
US1926490A
Cited
US2224414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |