US3443793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable area orifice,rotary control valve
Assignee: Individual
•
Filing: 1966-12-23
•
Granted: 1969-05-13
•
Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Eldon E Hulsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:21
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/062; F16K27/065; F16K27/067; F16K5/00; F16K5/04; F16K5/0407; F16K5/0435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA620068A
Cited
US1388673A
Cited
US1638152A
Cited
GB588396A
Cited
US2510514A
Cited
US2902253A
Cited
US2911009A
Cited
US3240466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |