US2979498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New monoazo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-04-18
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Granted: 1961-04-11
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Andrew Herbert Francis
- 👤 Stephen William Elliot
- 👤 Waite Frederick Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
THE DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
5 words
THE DYESTUFF 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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |