US2603659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developers
Assignee: EIDP Inc
•
Filing: 1950-06-16
•
Granted: 1952-07-15
•
Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
- 👤 Maynard S Raasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE CHEMICAL COMPOUNDS TAKEN FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
13 words
THE CHEMICAL COMPOUNDS TAKEN FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
References Cited (Backward Citations)
US1079246A
Cited
US1919592A
Cited
US1836295A
Cited
US2221131A
Cited
US2163166A
Cited
US2417514A
Cited
US2304925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |