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Patent US2139206A successfully refreshed from Google Patents.
US2139206A
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US
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Process of making abrasive elements
Assignee: National Poultry Equipment Co
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Filing: 1935-01-28
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Granted: 1938-12-06
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Expires: 1955-01-28
Abstract
No abstract record available.
Inventors
- 👤 John E Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:56
CPC Classifications
A; A01; A01K; A01K43/00; A01K43/005; B; B24; B24D; B24D11/00; B24D11/001; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16639; Y10T83/00; Y10T83/04; Y10T83/0596; Y10T83/384; Y10T83/394
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) | 1941-12-05 | 1942-06-06 | 1942-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-05 | 1946-06-06 | 1946-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-05 | 1950-06-06 | 1950-12-06 | $7700.00 | Window Closed / Lapsed |