Patent US2977992A successfully refreshed from Google Patents.
US2977992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for gas lines and the like
Assignee: Individual
•
Filing: 1958-05-16
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Granted: 1961-04-04
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 Irving J Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/132; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US586438A
Cited
US1278100A
Cited
US2370776A
Cited
US2535403A
Cited
US2687268A
Cited
US2750601A
Cited
US2725112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |