US2889156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded closure flange with locking projections
Assignee: American Flange and Manufacturing Co Inc
•
Filing: 1953-10-08
•
Granted: 1959-06-02
•
Expires: 1973-10-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Dearing
- 👤 Hermann H Gruczek
- 👤 Harold A Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:08
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/08; B65D39/082; B65D39/084; B65D39/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1540554A
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US1617302A
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US1574690A
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US1711291A
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US1789928A
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US1884602A
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US1856747A
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US1982144A
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US2262765A
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US2157978A
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US2156237A
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US2289409A
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US2567628A
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US2798742A
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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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |