US2907762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New anthraquinonoid dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1955-11-25
•
Granted: 1959-10-06
•
Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Heslop Robert Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
NEW ANTHRAQUINONOID DYESTUFFS WHICH ARE OF THE FORUMAL:
Claim 2
Dependent Claim
8 words
NEW ANTHRAQUINONOID DYESTUFFS WHICH ARE OF THE FORUMAL:
References Cited (Backward Citations)
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Cited
US2000121A
Cited
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Cited
GB467815A
Cited
US2339739A
Cited
US2740796A
Cited
US2722527A
Cited
FR1110925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |