US2722534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dyes for wool
Assignee: GAF Chemicals Corp
•
Filing: 1950-12-20
•
Granted: 1955-11-01
•
Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Edgar E Renfrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:57
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; C09B1/343
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
NEW DYESTUFFS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
NEW DYESTUFFS OF THE GENERAL 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) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |