Patent US2039852A successfully refreshed from Google Patents.
US2039852A
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Lapping method and apparatus
Assignee: CLARENCE I MCALLISTER
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Filing: 1933-12-08
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Granted: 1936-05-05
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Expires: 1953-12-08
Abstract
No abstract record available.
Inventors
- 👤 Harold E Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:45
CPC Classifications
B; B24; B24B; B24B11/00; Y; Y10; Y10S; Y10S451/00; Y10S451/913
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) | 1939-05-05 | 1939-11-04 | 1940-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-05 | 1943-11-04 | 1944-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-05 | 1947-11-04 | 1948-05-05 | $7700.00 | Window Closed / Lapsed |