US3472481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning valve closure
Assignee: Airco Inc
•
Filing: 1965-10-22
•
Granted: 1969-10-14
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 George R Spies Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:35
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/48; F16K1/487; F16K1/34; F16K1/36; F16K1/38; F16K1/42; F16K31/00; F16K31/44; F16K31/50; F16K2200/00; F16K2200/10; F16K2200/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2568615A
Cited
US2081616A
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US2118300A
Cited
US2452354A
Cited
US2843350A
Cited
US2952439A
Cited
US3001545A
Cited
US3385560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |