US2821171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure device and valve
Assignee: Individual
•
Filing: 1956-06-08
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Granted: 1958-01-28
•
Expires: 1976-06-08
Abstract
No abstract record available.
Inventors
- 👤 Lynn L Charlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:02
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/09; B62D5/093; B62D5/097; F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/103; F04C2/104; F04C2/105; F04C2/106; F15; F15B; F15B9/00; F15B9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |