Patent US2913022A successfully refreshed from Google Patents.
US2913022A
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US
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Work supporting device
Assignee: Individual
•
Filing: 1957-11-01
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Granted: 1959-11-17
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Expires: 1977-11-01
Abstract
No abstract record available.
Inventors
- 👤 George D Siemantel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
B; B23; B23D; B23D55/00; B23D55/02; B23Q; B23Q1/00; B23Q1/72; B23Q1/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US103347A
Cited
US1896924A
Cited
US949119A
Cited
US1864840A
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US2555217A
Cited
US2697458A
Cited
US2798520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |