Patent US2989283A successfully refreshed from Google Patents.
US2989283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing valves
Assignee: Individual
•
Filing: 1952-05-23
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Granted: 1961-06-20
•
Expires: 1972-05-23
Abstract
No abstract record available.
Inventors
- 👤 Karl A Klingler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:07
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/14; F16K27/00; F16K27/02; F16K27/0245
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |