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Patent US2980549A successfully refreshed from Google Patents.
US2980549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brightening of fine fabrics
Assignee: GAF Chemicals Corp
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Filing: 1956-06-21
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Granted: 1961-04-18
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Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Louis E Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:33
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/636
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
PROCESS FOR ACHIEVING A BRIGHTENING EFFECT ON WHITE AND COLORED FIBERS, FILAMENTS AND FABRICS OF SYNTHETIC MATERIALS, WHICH COMPRISES APPLYING TO SAID FIBERS, FILAMENTS AND FABRICS AN AQUEOUS DISPERSION OF FROM 0.05 TO 0.5%, BASED ON THE WEIGHT OF SAID FIBERS, FILAMENTS AND FABRICS, IN A WATER-MISCIBLE ORGANIC SOLVENT THEREFOR, OF A DIPHENYLINDOLE OF THE FORMULA
Claim 2
Dependent Claim
56 words
PROCESS FOR ACHIEVING A BRIGHTENING EFFECT ON WHITE AND COLORED FIBERS, FILAMENTS AND FABRICS OF SYNTHETIC MATERIALS, WHICH COMPRISES APPLYING TO SAID FIBERS, FILAMENTS AND FABRICS AN AQUEOUS DISPERSION OF FROM 0.05 TO 0.5%, BASED ON THE WEIGHT OF SAID FIBERS, FILAMENTS AND FABRICS, IN A WATER-MISCIBLE ORGANIC SOLVENT THEREFOR, OF A DIPHENYLINDOLE OF THE FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US1780058A
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Cited
US2460745A
Cited
US2510432A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |