US1454218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic optical system
Assignee: Eastman Kodak Co
•
Filing: 1920-07-23
•
Granted: 1923-05-08
•
Expires: 1940-07-23
Abstract
No abstract record available.
Inventors
- 👤 William F Folmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-05-07 | 1926-11-06 | 1927-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-05-07 | 1930-11-06 | 1931-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-05-07 | 1934-11-06 | 1935-05-08 | $7700.00 | Window Closed / Lapsed |