US2780233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Through conduit gate valve
Assignee: Individual
•
Filing: 1951-03-06
•
Granted: 1957-02-05
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Volpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:49
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/14; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6065; Y10T137/6072; Y10T137/6089; Y10T137/6106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1692177A
Cited
US1667203A
Cited
US1801960A
Cited
US1871965A
Cited
US2030458A
Cited
US2109042A
Cited
FR844269A
Cited
US2504924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |