US2699153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing valve mechanism
Assignee: Individual
•
Filing: 1952-08-29
•
Granted: 1955-01-11
•
Expires: 1972-08-29
Abstract
No abstract record available.
Inventors
- 👤 Russell Carl Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:10
CPC Classifications
F; F01; F01L; F01L23/00; F04; F04B; F04B9/00; F04B9/08; F04B9/12; F04B9/129; F04B9/131; F04B9/135; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/87169; Y10T137/87217; Y10T137/87225
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) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |