US3069128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve seal construction
Assignee: Individual
•
Filing: 1960-08-22
•
Granted: 1962-12-18
•
Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Grove Marvin Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:53
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2573177A
Cited
US2893682A
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FR1116056A
Cited
GB781183A
Cited
US2890856A
Cited
US2863630A
Cited
US2913218A
Cited
FR1213643A
Cited
US2974921A
Cited
FR1238094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |