US2662447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified gauss-type high-speed photographic objective with anastigmatic flattened field
Assignee: Voigtlander AG
•
Filing: 1952-01-25
•
Granted: 1953-12-15
•
Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Tronnier Albrecht Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
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)
DE428657C
Cited
US2012822A
Cited
DE665520C
Cited
US2106077A
Cited
US2164028A
Cited
CH229459A
Cited
US2487750A
Cited
US2549159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |