Patent US3711546A successfully refreshed from Google Patents.
US3711546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(ortho-substituted benzene or naphthalene carboxamidoethyle)para-phenylene diamines as coupler-developers
Assignee: Individual
•
Filing: 1969-06-09
•
Granted: 1973-01-16
•
Expires: 1989-06-09
Abstract
Abstract Novel coupler developers for preparing color transfer images. Essentially the coupler developers contain a coupling moiety linked to a silver halide developing moiety.
Inventors
- 👤 M Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:19
CPC Classifications
C; C09; C09B; C09B43/00; G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A compound of claim 1 of the formula:
Claim 2
Dependent Claim
8 words
A compound of claim 1 of the formula:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |