Patent US2685229A successfully refreshed from Google Patents.
US2685229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic objective of three air spaced subassembly members in axial alignment
Assignee: CYCLOPTIC ANSTALT fur OPTIK UN
•
Filing: 1952-08-16
•
Granted: 1954-08-03
•
Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Schulz Hans
- 👤 Seibert Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:29
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2313460A
Cited
US2276723A
Cited
US2445594A
Cited
US2502544A
Cited
US2541484A
Cited
US2578624A
Cited
US2604013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |