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Patent US2908923A successfully refreshed from Google Patents.
US2908923A
Expired / Lapsed
US
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Lens cleaning device
Assignee: Individual
•
Filing: 1957-12-23
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Granted: 1959-10-20
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edward E Schlechter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:14
CPC Classifications
G; G02; G02C; G02C13/00; G02C13/006; Y; Y10; Y10S; Y10S24/00; Y10S24/11; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1189505A
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US1796346A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |