US3135734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dye developers
Assignee: Polaroid Corp
•
Filing: 1962-01-12
•
Granted: 1964-06-02
•
Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 Green Milton
- 👤 Center Newton
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
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
5 words
AZO DYES OF THE FORMULA:
Claim 2
Dependent Claim
5 words
AZO DYES OF THE FORMULA:
References Cited (Backward Citations)
US2997390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |