Patent US2172094A successfully refreshed from Google Patents.
US2172094A
Expired / Lapsed
US
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Clench tube for safeguarding scaffold workers
Assignee: Individual
•
Filing: 1938-09-27
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Granted: 1939-09-05
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Expires: 1958-09-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Voigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:37
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/32; E04G21/3261; A; A62; A62B; A62B35/00; A62B35/04; Y; Y10; Y10T; Y10T24/00; Y10T24/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |