US3458171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat ring for ball valves
Assignee: Lunkenheimer Co
•
Filing: 1967-05-08
•
Granted: 1969-07-29
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 John B Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:53
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2945666A
Cited
US2989990A
Cited
US3067978A
Cited
US3171429A
Cited
US3146988A
Cited
US3331581A
Cited
US3347517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |