Patent US2961756A successfully refreshed from Google Patents.
US2961756A
Expired / Lapsed
US
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Tool for insertion and removal of closure fittings
Assignee: American Flange and Manufacturing Co Inc
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Filing: 1956-10-29
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Granted: 1960-11-29
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Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:37
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/40; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T29/53796; Y10T29/53896; Y10T29/53987
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US675921A
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US740122A
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US780727A
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US1151712A
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US1444280A
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US1968640A
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US1964468A
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US2118314A
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US2439501A
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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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |