Patent US2718979A successfully refreshed from Google Patents.
US2718979A
Expired / Lapsed
US
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Closure plugs and methods for forming the same
Assignee: American Flange and Manufacturing Co Inc
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Filing: 1950-08-16
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Granted: 1955-09-27
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Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Preston S Parish
- 👤 John M Marchyn
- 👤 Walter J Pentesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:14
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/08; B65D39/082; B65D39/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US874256A
Cited
FR555336A
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US1939022A
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US1999205A
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US2337622A
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US2448521A
Cited
US2445465A
Cited
US2483964A
Cited
US2498345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |