US2559844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical objective system comprising a positive member and a negative auxiliary member
Assignee: Eastman Kodak Co
•
Filing: 1949-01-21
•
Granted: 1951-07-10
•
Expires: 1969-01-21
Abstract
No abstract record available.
Inventors
- 👤 Harold F Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:39
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US538182A
Cited
US943105A
Cited
US1073950A
Cited
US1479251A
Cited
US1484853A
Cited
US1955590A
Cited
US2321973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |