US2657640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Clayton Manufacturing Co
•
Filing: 1947-05-06
•
Granted: 1953-11-03
•
Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 Arant Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/06; F04B15/00; F04B15/06; F04B53/08; F04B53/10; F04B53/1037; Y; Y10; Y10S; Y10S417/00; Y10S417/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US879560A
Cited
FR12183E
Cited
US1707307A
Cited
GB255425A
Cited
US1812590A
Cited
US1979476A
Cited
US2054710A
Cited
US2300332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |