Patent US2918465A successfully refreshed from Google Patents.
US2918465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transforming oxazine dyestuff bases to pigments
Assignee: GAF Chemicals Corp
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Filing: 1956-12-03
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Granted: 1959-12-22
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Lytle
- 👤 Robert E Brouillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
C; C09; C09B; C09B19/00; C09B19/02; C09B67/00; C09B67/0001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF PRODUCING A TINCTORIALLY STRONG OXAZINE DYESTUFF BASE IN A PIGMENTARY STATE WHICH COMPRISES GRINDING, IN ADMIXTURE 1-10 PARTS BY WEIGHT OF A WATER SOLUBLE ALKYLENE GLYCOL CONTAINING FROM 2 TO 12 CARBON ATOMS, 1-20 PARTS BY WEIGHT OF A FINELY DIVIDED INORGANIC SALT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL CHLORIDES, SULFATES AND PHOSPHATES, BARIUM AND CALCIUM SULFATES, AND ALUMINUM AND MAGNESIUM HYDRATES, AND 1 PART BY WEIGHT OF AN OXAZINE DYE BASE SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
Claim 2
Independent Claim
88 words
THE METHOD OF PRODUCING A TINCTORIALLY STRONG OXAZINE DYESTUFF BASE IN A PIGMENTARY STATE WHICH COMPRISES GRINDING, IN ADMIXTURE 1-10 PARTS BY WEIGHT OF A WATER SOLUBLE ALKYLENE GLYCOL CONTAINING FROM 2 TO 12 CARBON ATOMS, 1-20 PARTS BY WEIGHT OF A FINELY DIVIDED INORGANIC SALT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL CHLORIDES, SULFATES AND PHOSPHATES, BARIUM AND CALCIUM SULFATES, AND ALUMINUM AND MAGNESIUM HYDRATES, AND 1 PART BY WEIGHT OF AN OXAZINE DYE BASE SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |