Patent US2831805A successfully refreshed from Google Patents.
US2831805A
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Photodecomposition of compounds containing a quinoneimine oxide unit
Assignee: EIDP Inc
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Filing: 1956-03-02
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Granted: 1958-04-22
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Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Pedersen Charles John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
C; C07; C07C; C07C46/00; C07C46/02; C07C291/00; C07C291/02; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR TRANSFORMING A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AN N,N''-DISUBSTITUTED-P-QUINONE DIIMINE-N,N''-DIOXIDE AND AN N,N''-DISUBTITUTED 4,4''-DIPHENOQUINONE DIIMINE-N,N''-DIOXIDE INTO THE CORRESPONDING QUINONE COMPOUND AND AN AZO COMPOUND BY IRRADIATING WITH AN ACTINIC LIGHT RICH IN WAVELENGTHS WITHIN THE RANGE OF 3000 A. TO 6000 A.
Claim 2
Dependent Claim
47 words
A PROCESS FOR TRANSFORMING A COMPOUND TAKEN FROM THE GROUP CONSISTING OF AN N,N''-DISUBSTITUTED-P-QUINONE DIIMINE-N,N''-DIOXIDE AND AN N,N''-DISUBTITUTED 4,4''-DIPHENOQUINONE DIIMINE-N,N''-DIOXIDE INTO THE CORRESPONDING QUINONE COMPOUND AND AN AZO COMPOUND BY IRRADIATING WITH AN ACTINIC LIGHT RICH IN WAVELENGTHS WITHIN THE RANGE OF 3000 A. TO 6000 A.
References Cited (Backward Citations)
US2681918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |