US3879463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted butadiene and hexatriene photosensitizers
Assignee: Pharmacia and Upjohn Co
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Filing: 1973-05-10
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Granted: 1975-04-22
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Expires: 1993-05-10
Abstract
Abstract A novel class of compounds is disclosed of the formula WHEREIN R1 and R2 are lower-alkoxy or di(lower-alkyl)amino and R2 can be hydrogen and R3 and R4 are hydrogen, lower-alkoxy or di(lower-alkyl)amino and n is an integer from 1 to 5. The compounds are sensitizers for photosensitive compounds particularly polymers containing sulfonazido groups as the lightsensitive moiety.
Inventors
- 👤 Jr Gerret M Peters
- 👤 Fred A Stuber
- 👤 Henri Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:38
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4056; G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/0085; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
5 words
A compound having the formula:
Claim 4
Dependent Claim
5 words
A compound having the formula:
Claim 5
Dependent Claim
1 words
1-(2,5-dimethoxyphenyl)-4-(4-dimethylaminophenyl)-1,3-butadiene.
Claim 6
Dependent Claim
1 words
1-(2,5-dimethoxyphenyl)-4-(4-dimethylaminophenyl)-1,3-butadiene.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |