Patent US2546791A successfully refreshed from Google Patents.
US2546791A
Expired / Lapsed
US
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Masking the odor of ammonia in developing diazotypes
Assignee: GAF Chemicals Corp
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Filing: 1948-12-16
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Granted: 1951-03-27
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Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 Slifkin Sam Charles
- 👤 Jr John Sulich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:48
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE PROCESS OF DEVELOPING DIAZOTYPES BY MEANS OF ODOR MASKED AMMONIA VAPORS WHICH COMPRISES CONTACTING THE DIAZOTYPE MATERIAL WITH THE VAPORS FROM AN AQUEOUS AMMONIA SOLUTION OF PETITGRAIN OIL DISSOLVED IN ISOPROPYL ALCOHOL.
Claim 2
Dependent Claim
33 words
THE PROCESS OF DEVELOPING DIAZOTYPES BY MEANS OF ODOR MASKED AMMONIA VAPORS WHICH COMPRISES CONTACTING THE DIAZOTYPE MATERIAL WITH THE VAPORS FROM AN AQUEOUS AMMONIA SOLUTION OF PETITGRAIN OIL DISSOLVED IN ISOPROPYL ALCOHOL.
References Cited (Backward Citations)
US1582912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |