US2986528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of optically brightening organic materials and preparations therefor
Assignee: BASF Schweiz AG
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Filing: 1957-03-07
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Granted: 1961-05-30
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Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Siegrist Adolf Emil
- 👤 Duennenberger Max
- 👤 Grubenmann Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:04
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/30; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A PROCESS FOR THE OPTICAL BRIGHTENING OF CELLULOSIC MATERIAL WHICH COMPRISES APPLYING TO SAID MATERIAL A COMPOSITION SUBSTANTIALLY CONSISTING OF AN ORGANIC CARRIER MATERIAL HAVING A PARTICLE SIZE LESS THAN 50U, BEING CAPABLE OF FORMING FIBERS AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, POLYESTER, POLYAMIDE AND ACETYL CELLULOSE, ON WHICH ORGANIC CARRIER IS FIXED AN OPTICAL BRIGHTENING AGENT HAVING AT LEAST ONE FIVE-MEMBERED HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF IMIDAZOLE, OXAZOLE, 1:2:3-TRIAZOLE AND 1:3:4-OXIDAZOLE RINGS.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE OPTICAL BRIGHTENING OF CELLULOSIC MATERIAL WHICH COMPRISES APPLYING TO SAID MATERIAL A COMPOSITION SUBSTANTIALLY CONSISTING OF AN ORGANIC CARRIER MATERIAL HAVING A PARTICLE SIZE LESS THAN 50U, BEING CAPABLE OF FORMING FIBERS AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, POLYESTER, POLYAMIDE AND ACETYL CELLULOSE, ON WHICH ORGANIC CARRIER IS FIXED AN OPTICAL BRIGHTENING AGENT HAVING AT LEAST ONE FIVE-MEMBERED HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF IMIDAZOLE, OXAZOLE, 1:2:3-TRIAZOLE AND 1:3:4-OXIDAZOLE RINGS.
Claim 3
Dependent Claim
66 words
AN OPTICAL BRIGHTENING COMPOSITION SUBSTANTIALLY CONSISTING OF AN ORGANIC CARRIER MATERIAL HAVING A PARTICLE SIZE LESS THAN 50U, BEING CAPABLE OF FORMING FIBERS AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, POLYESTER, POLYAMIDE AND ACETYL CELLULOSE, ON WHICH ORGANIC CARRIER IS FIXED AN OPTICAL BRIGHTENING AGENT HAVING AT LEAST ONE FIVE-MEMBERED HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF IMIDAZOLE, OXAZOLE, 1:2:3-TRIAZOLE AND 1:3:4-OXDIAZOLE RINGS.
Claim 4
Dependent Claim
66 words
AN OPTICAL BRIGHTENING COMPOSITION SUBSTANTIALLY CONSISTING OF AN ORGANIC CARRIER MATERIAL HAVING A PARTICLE SIZE LESS THAN 50U, BEING CAPABLE OF FORMING FIBERS AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, POLYESTER, POLYAMIDE AND ACETYL CELLULOSE, ON WHICH ORGANIC CARRIER IS FIXED AN OPTICAL BRIGHTENING AGENT HAVING AT LEAST ONE FIVE-MEMBERED HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF IMIDAZOLE, OXAZOLE, 1:2:3-TRIAZOLE AND 1:3:4-OXDIAZOLE RINGS.
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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |