US2553655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Vickers Inc
•
Filing: 1946-03-14
•
Granted: 1951-05-22
•
Expires: 1966-03-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Herman
- 👤 Ralph L Tweedale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2014; F04B1/2042; F04B1/2035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE285468C
Cited
US924787A
Cited
US1081810A
Cited
GB442450A
Cited
GB506684A
Cited
US2313407A
Cited
US2288768A
Cited
US2418123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |