Patent US2747339A successfully refreshed from Google Patents.
US2747339A
Expired / Lapsed
US
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Lens grinding machine
Assignee: Bausch and Lomb Inc
•
Filing: 1954-01-18
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Granted: 1956-05-29
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 George C Schelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:59
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1156292A
Cited
US1625049A
Cited
US1984074A
Cited
US2589488A
Cited
US2556604A
Cited
US2633675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |