Patent US2100564A successfully refreshed from Google Patents.
US2100564A
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US
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Method of producing a pulling stress and hydraulic pulling mechanism
Assignee: Blackhawk Manufacturing Co
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Filing: 1935-03-16
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Granted: 1937-11-30
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Expires: 1955-03-16
Abstract
No abstract record available.
Inventors
- 👤 Mandl Siegmund
- 👤 Edward M Pfauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/10; Y; Y10; Y10T; Y10T24/00; Y10T24/21; Y10T24/2177
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) | 1940-11-29 | 1941-05-31 | 1941-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-11-29 | 1945-05-31 | 1945-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-11-29 | 1949-05-31 | 1949-11-30 | $7700.00 | Window Closed / Lapsed |