US2674985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating valve
Assignee: Allis Chalmers Corp
•
Filing: 1949-11-01
•
Granted: 1954-04-13
•
Expires: 1969-11-01
Abstract
No abstract record available.
Inventors
- 👤 Carlin Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/32; Y; Y10; Y10T; Y10T137/00; Y10T137/6198; Y10T137/6253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1213590A
Cited
US1462160A
Cited
GB423998A
Cited
US2165238A
Cited
US2165239A
Cited
US2142224A
Cited
US2175465A
Cited
US2346525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |