US2999510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic lubricant-sealed plug valve
Assignee: Individual
•
Filing: 1957-07-05
•
Granted: 1961-09-12
•
Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Volpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/222; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4372
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734523A
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US910401A
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US2077191A
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US2321233A
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US2360599A
Cited
US2594611A
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US2572894A
Cited
US2573238A
Cited
US2600836A
Cited
US2780232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |