US2977975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Cooper Industries LLC
•
Filing: 1957-05-06
•
Granted: 1961-04-04
•
Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Allen Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
F; F16; F16K; F16K29/00; F16K29/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6198
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1770900A
Cited
DE629628C
Cited
US2192339A
Cited
US2230600A
Cited
US2310583A
Cited
US2767730A
Cited
US2854209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |