US2794802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of pinakryptol yellow
Assignee: GAF Chemicals Corp
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Filing: 1954-06-04
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Granted: 1957-06-04
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Horwitz Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:59
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS OF PRODUCING PINAKRYPTOL YELLOW IN HIGH YIELDS AND IN A STATE OF HIGH PURITY WHICH COMPRISES ADMIXING EQUILMOLAR QUANTITIES OF A 1-METHYL-6-ETHOXYQUINALDINIUM SALT AND M-NITRO-BENZALDEHYDE, ADDING A SOLVENT AND AN ACID BINDING AGENT AND BRINGING THE REACTANTS FROM ROOM TEMPERATURE TO A TEMPERATURE OF ABOUT 80*C. IN A PERIOD OF A FEW MINUTES, AND CONTINUING THE HEATING AT THIS TEMPERATURE UNTIL THE REACTION GOES TO COMPLETION.
Claim 2
Dependent Claim
68 words
THE PROCESS OF PRODUCING PINAKRYPTOL YELLOW IN HIGH YIELDS AND IN A STATE OF HIGH PURITY WHICH COMPRISES ADMIXING EQUILMOLAR QUANTITIES OF A 1-METHYL-6-ETHOXYQUINALDINIUM SALT AND M-NITRO-BENZALDEHYDE, ADDING A SOLVENT AND AN ACID BINDING AGENT AND BRINGING THE REACTANTS FROM ROOM TEMPERATURE TO A TEMPERATURE OF ABOUT 80*C. IN A PERIOD OF A FEW MINUTES, AND CONTINUING THE HEATING AT THIS TEMPERATURE UNTIL THE REACTION GOES TO COMPLETION.
References Cited (Backward Citations)
US1653314A
Cited
US1994170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |