Patent US4628364A successfully refreshed from Google Patents.
Patent US4009008A successfully refreshed from Google Patents.
US4009008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored water immiscible organic liquid
Assignee: ATK Launch Systems LLC
•
Filing: 1974-11-18
•
Granted: 1977-02-22
•
Expires: 1994-11-18
Abstract
Abstract Novel disazo colorants or dyes for marking organic liquids, the colorants having the general formula <IMAGE> where R1 is H, CF3, or alkyl having from 1 to 4 carbon atoms, R2 is H, or alkyl having from 1 to 4 carbon atoms, R3 and R4 are each H, OCH3, OC2H5 or CH3, and R5, R6 and R7 are each H, or alkyl having from 1 to 12 carbon atoms, at least one of said R5, R6 and R7 being alkyl.
Inventors
- 👤 Richard B. Orelup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:41
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003; C09; C09B; C09B31/00; C09B31/02; C09B31/04; C09B31/053; Y; Y10; Y10S; Y10S252/00; Y10S252/965; Y10T; Y10T436/00; Y10T436/13
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A colored water immiscible organic liquid having dissolved therein a disazo colorant corresponding to the formula ##STR23## in which R 1 is H, CF 3 , or alkyl having from 1 to 4 carbon atoms, R 2 is H or alkyl having from 1 to 4 carbon atoms, R 3 and R 4 are each H, OCH 3 , OC 2 H 5 or CH 3 and R 5 , R 6 and R 7 are each H or alkyl having 1 to 12 carbon atoms, at least one of said R 5 , R 6 and R 7 being alkyl, said disazo colorant being highly resistant to removal from said organic liquid by the commonly used adsorbents such as carbon black, charcoal, clay and silica.
Claim 2
Dependent Claim
126 words
A colored water immiscible organic liquid having dissolved therein a disazo colorant corresponding to the formula ##STR23## in which R 1 is H, CF 3 , or alkyl having from 1 to 4 carbon atoms, R 2 is H or alkyl having from 1 to 4 carbon atoms, R 3 and R 4 are each H, OCH 3 , OC 2 H 5 or CH 3 and R 5 , R 6 and R 7 are each H or alkyl having 1 to 12 carbon atoms, at least one of said R 5 , R 6 and R 7 being alkyl, said disazo colorant being highly resistant to removal from said organic liquid by the commonly used adsorbents such as carbon black, charcoal, clay and silica.
Claim 3
Dependent Claim
53 words
The colored water immiscible organic liquid of Claim 1 wherein R 1 is CF 3 , R 2 is H, R 3 is OCH 3 , R 4 is CH 3 , R 5 is C 7 H 15 , R 6 is C 12 H 25 , and R 7 is H.
Claim 4
Dependent Claim
65 words
A colored water immiscible organic liquid having dissolved therein a disazo colorant comprising a mixture of compounds having the formula ##STR24## where R 1 , R 2 , R 3 and R 4 are each H or CH 3 , said disazo colorant being highly resistant to removal from said organic liquid by the commonly used adsorbents such as carbon black, charcoal, clay and silica.
Claim 5
Dependent Claim
65 words
A colored water immiscible organic liquid having dissolved therein a disazo colorant comprising a mixture of compounds having the formula ##STR24## where R 1 , R 2 , R 3 and R 4 are each H or CH 3 , said disazo colorant being highly resistant to removal from said organic liquid by the commonly used adsorbents such as carbon black, charcoal, clay and silica.
References Cited (Backward Citations)
US1914549A
Cited
US1986116A
Cited
US2059094A
Cited
US2925333A
Cited
US3004821A
Cited
US3049532A
Cited
US3704106A
Cited
US3690809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |