US3667727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat for ball or gate valves
Assignee: Individual
•
Filing: 1971-05-10
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Granted: 1972-06-06
•
Expires: 1991-05-10
Abstract
Abstract A SEAT FOR A BALL OR GATE VALVE INCLUDES AN INSERT WHICH MAINTAINS A CONSTANT SEALED CONTACT WITH THE BALL OR GATE NO MATTER WHAT PRESSURE DIFFERENTIAL EXISTS BETWEEN LINE PRESSURE AND THE VALVE BODY CAVITY PRESSURE.
Inventors
- 👤 Billy W Bowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:16
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227; F16K5/00; F16K5/06; F16K5/0663; F16K5/0673
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |