US2651970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly corrected image producing photgraphic objective system
Assignee: CYCLOPTIC ANSTALT fur OPTIK UN
•
Filing: 1949-08-17
•
Granted: 1953-09-15
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Tiller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:11
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US660202A
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US2502544A
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CH271419A
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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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |