Patent US3495259A successfully refreshed from Google Patents.
US3495259A
Expired / Lapsed
US
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Electrically heated optical device
Assignee: Eltro GmbH and Co
•
Filing: 1968-05-23
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Granted: 1970-02-10
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Expires: 1988-05-23
Abstract
No abstract record available.
Inventors
- 👤 Martin-Gottfried Rocholl
- 👤 Wolfgang Kriege Leimen
- 👤 Rainer Strietzel
- 👤 August Hertel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:04
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/0006; H; H05; H05B; H05B3/00; H05B3/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2442913A
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US2557983A
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US2882377A
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US2982934A
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US3052787A
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US3027561A
Cited
US3343985A
Cited
US3288983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |