US3429997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image flattening optical system for electronic image converting tube
Assignee: Optische Werke G Rodenstock
•
Filing: 1965-08-18
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Granted: 1969-02-25
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Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Ortwin Rosner
- 👤 Franz Schlegel
- 👤 Nikolaus Sebestyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
G; G02; G02B; G02B9/00; G02B9/34; G02B13/00; G02B13/16; H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1230136A
Cited
US2172775A
Cited
US2494992A
Cited
US2419177A
Cited
US2446843A
Cited
US2531956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |