US2582087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of blocking and unblocking lens blanks for surfacing operations
Assignee: Eastman Kodak Co
•
Filing: 1948-12-08
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Granted: 1952-01-08
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Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 John R Turner
- 👤 Rudolph W Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005; B24B13/0057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR460049A
Cited
US1331480A
Cited
US1332778A
Cited
US1456673A
Cited
US2224168A
Cited
US2432491A
Cited
US2291862A
Cited
US2462072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |