US3139341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two component diazotype layers comprising a di-alkyl [piperazino-methyl]-phenol coupling compound
Assignee: Keuffel and Esser Co
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Filing: 1961-11-30
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Granted: 1964-06-30
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Expires: 1981-11-30
Abstract
No abstract record available.
Inventors
- 👤 Schlesinger Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:55
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/096; B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/167; B06B1/168; C07D295/084; C07D295/088; C07D295/16; C07D295/20; C07D295/205; G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A TWO-COMPONENT DIAZOTYPE COATING COMPOSITION COMPRISING A LIGHT-SENSITIVE DIAZONIUM COMPOUND AND AN AZO COUPLING COMPONENT HAVING THE GENERAL FORMULA:
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |