Patent US2889974A successfully refreshed from Google Patents.
US2889974A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1955-12-27
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Granted: 1959-06-09
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Willard L Sauvago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:11
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB225154A
Cited
US1665214A
Cited
US2161855A
Cited
US2321360A
Cited
US2587921A
Cited
US2823789A
Cited
US2744649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |