Patent US2866912A successfully refreshed from Google Patents.
US2866912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distributor
Assignee: Individual
•
Filing: 1957-02-15
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Granted: 1958-12-30
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Expires: 1977-02-15
Abstract
No abstract record available.
Inventors
- 👤 Charles J Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:46
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/021; F02P7/026; F02P7/027; F02P9/00; F02P9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |