Patent US3923876A successfully refreshed from Google Patents.
Patent US3512753A successfully refreshed from Google Patents.
US3512753A
Expired / Lapsed
US
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Valve
Assignee: Anderson Greenwood and Co
•
Filing: 1967-05-02
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Granted: 1970-05-19
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Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Irvin B Weise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12; F16K27/00; F16K27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US972336A
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US1086221A
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US1754198A
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US2112913A
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US2122667A
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US2174861A
Cited
US2323894A
Cited
US2451928A
Cited
US2510442A
Cited
US2801820A
Cited
US3010695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |