US3684510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive material comprising indolylmethane derivatives and tetrabromomethane
Assignee: Agfa Gevaert AG
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Filing: 1970-08-21
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Granted: 1972-08-15
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Expires: 1990-08-21
Abstract
Abstract A MIXTURE OF (1) AND INDOLYL METHANE COMPOUND OF THE FORMULA 2-R1,3-(R2-O-CH(-A)-)INDOLE IN WHICH A IS ARYL OR A HETEROCYLIC AROMATIC GROUP AND R1 AND R2 ARE H, ALKYL OR ARALKYL, (2) AN ARYL AMINO COMPOUND AND (3) A TETRAHALOMETHANE COMPOUND CAN BE USED FOR THE PRODUCTION OF COPIES.
Inventors
- 👤 Hubertus Psaar
- 👤 Walter Puschel
- 👤 Roderich Raue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:26
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03C7/00; G03C7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |