Patent US4722085A successfully refreshed from Google Patents.
US2548418A
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Surfacing machine
Assignee: American Optical Corp
•
Filing: 1947-12-19
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Granted: 1951-04-10
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Expires: 1967-12-19
Abstract
No abstract record available.
Inventors
- 👤 Daniel P Bernheim
- 👤 William A Gunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:39
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/043; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/308736
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US646397A
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US1140421A
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US1261765A
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US1330558A
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US1901181A
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US1873067A
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US1985213A
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US2104345A
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US2248263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |