US3403886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve with positive reduction closure member
Assignee: Sandall Precision Co Ltd
•
Filing: 1965-12-27
•
Granted: 1968-10-01
•
Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Barker Alfred Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:00
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/18; F16K5/184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE399092C
Cited
DE406891C
Cited
US1595038A
Cited
US1985449A
Cited
US2501635A
Cited
US2612338A
Cited
US3033513A
Cited
GB922824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |