US3636065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble anthraquinone dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1968-06-12
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Granted: 1972-01-18
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Expires: 1988-06-12
Abstract
Abstract 1,5 - DIHYDROXY - 4,8 - DIAMINO - 2 - PHENYL-ANTHRAQUINONES CARRYING IN P-POSITION AT THE PHENYL RESIDUE AN ACYLOXY GROUP OF A SULFUR- OR NITOGEN-CONTAINING CARBONIC ACID DERIVATIVE.
Inventors
- 👤 Jean-Frederic Guye-Vuilleme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:20
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/503; C09B1/51; C09B1/515; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |