Patent US2194546A successfully refreshed from Google Patents.
US2194546A
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US
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Diamond lap
Assignee: American Optical Corp
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Filing: 1937-11-04
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Granted: 1940-03-26
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Expires: 1957-11-04
Abstract
No abstract record available.
Inventors
- 👤 Lloyd W Goddu
- 👤 William J Wrighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/06; B24D7/063; B24D7/18; Y; Y10; Y10S; Y10S76/00; Y10S76/12
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) | 1943-03-26 | 1943-09-25 | 1944-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-26 | 1947-09-25 | 1948-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-26 | 1951-09-25 | 1952-03-26 | $7700.00 | Window Closed / Lapsed |