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US2873681A
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Assignee: Individual
•
Filing: 1945-02-03
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Granted: 1959-02-17
•
Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 Charles C Lauritsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/28; F42C15/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1224163A
Cited
US1850196A
Cited
US2030085A
Cited
US2145507A
Cited
GB522990A
Cited
US2368747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |