US3465780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve,mainly from synthetic material such as plastic,for air tubes and method of manufacturing of the shaft of such a valve
Assignee: Individual
•
Filing: 1967-02-27
•
Granted: 1969-09-09
•
Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jacobus Henricus Duymelinck
- 👤 Rients Schootstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:19
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3786; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/4941
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |