Patent US2697872A successfully refreshed from Google Patents.
US2697872A
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US
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Assignee: Individual
•
Filing: 1950-10-05
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Granted: 1954-12-28
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Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Robert S Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:41
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/026; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/5383; Y10T29/53987
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1241819A
Cited
US1483818A
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GB367139A
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US1902571A
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US1964023A
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US2036665A
Cited
US2098134A
Cited
US2246954A
Cited
US2282556A
Cited
US2497489A
Cited
US2569504A
Cited
US2542305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |