US3497177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat and seal assembly for valves
Assignee: Individual
•
Filing: 1967-11-02
•
Granted: 1970-02-24
•
Expires: 1987-11-02
Abstract
No abstract record available.
Inventors
- 👤 Eldon E Hulsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:17
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/188; F16K3/0227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US783953A
Cited
US2664267A
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US2996083A
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US3047265A
Cited
US3110470A
Cited
US3077201A
Cited
US3235224A
Cited
US3250510A
Cited
US3353783A
Cited
US3405911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |