Patent US3578452A successfully refreshed from Google Patents.
US3578452A
Expired / Lapsed
US
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Developing compositions for diazotype materials
Assignee: AB Dick Co
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Filing: 1968-09-12
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Granted: 1971-05-11
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Expires: 1988-09-12
Abstract
Abstract DIAZOTYPE DEVELOPING COMPOSITIONS COMPRISING A LIQUID ORGANIC AMINE SUCH AS MORPHOLINE, ALKYLMORPHOLINE, PIPERIDINE, ALKYLPIPERIDINE, OR AN AMINE OF THE FORMULA R1-N(-R2)-R3 WHEREIN R1 IS HYDROXYALKYL, CYCLOALKYL OR ARALKYL DISSOLVED IN A POLYHYDRIC ALCHOL, A GLYCOL ETHER OR A MONOHYDRIC ALCOHOL CONTAINING AT LEAST SIX CARBON ATOMS WITH WATER IN AN AMOUNT NOT GREATER THAN THE WEIGHT OF THE ORGANIC SOLVENT.
Inventors
- 👤 Konrad Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:50
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/88; C07D311/00; C07D311/02; C07D311/76; G; G03; G03C; G03C5/00; G03C5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |