US3529622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced pressure responsive valve
Assignee: Anderson Greenwood and Co
•
Filing: 1968-04-22
•
Granted: 1970-09-22
•
Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Irvin B Weise
- 👤 Jone Yen Ligh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:16
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1266; F16K1/00; F16K1/32; F16K1/34; F16K1/42; F16K1/427; Y; Y10; Y10S; Y10S137/00; Y10S137/906; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/7722; Y10T137/7781; Y10T137/7835; Y10T137/7836; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314977A
Cited
US1860450A
Cited
US2485092A
Cited
US2748797A
Cited
US3078066A
Cited
US2994340A
Cited
US3389796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |