US3907576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions containing werner complexes of chromium and fluorinated carboxylic acids
Assignee: Novartis Corp
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Filing: 1972-02-22
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Granted: 1975-09-23
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Expires: 1992-02-22
Abstract
Abstract Oil and water repellent compositions containing Werner complexes formed from trivalent chromium and a mixture of fluorinated acids of the type RfCOOH and RfCH2COOH.
Inventors
- 👤 Robert E Dear
- 👤 Jai Prakash Tandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:43
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; C; C09; C09K; C09K3/00; C09K3/18; C14; C14C; C14C9/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A WATER AND OIL-REPELLENT COMPOSITION CONTAINING A SOLVENT AND WENER TYPE COMPLEXES PREPARED BY REACTING TRIVALENT CHROMIUM WITH A MIXTURE OF A. A FLUORINATED ACID OF THE TYPE RFCOOH, AND B. A FLUORINATED ACID OF THE TYPE RFCH2 COOH, WHEREIN RF IS A PERFLUOROALKYL GROUP OF 3 TO 18 CARBON ATOMS AND THE MOLE RATIO OF CHROMIUM TO ACID TYPES A AND B IS BETWEEN 2:1 AND 4:1, SAID COMPOSITION CONTAINING FROM 10 TO 99 PARTS BY WEIGT OF RFCOOH AND CORRESPONDINGLY FROM 90 TO 1 PART BY WEIGHT OF RFCH2COOH.
Claim 2
Dependent Claim
91 words
A WATER AND OIL-REPELLENT COMPOSITION CONTAINING A SOLVENT AND WENER TYPE COMPLEXES PREPARED BY REACTING TRIVALENT CHROMIUM WITH A MIXTURE OF A. A FLUORINATED ACID OF THE TYPE RFCOOH, AND B. A FLUORINATED ACID OF THE TYPE RFCH2 COOH, WHEREIN RF IS A PERFLUOROALKYL GROUP OF 3 TO 18 CARBON ATOMS AND THE MOLE RATIO OF CHROMIUM TO ACID TYPES A AND B IS BETWEEN 2:1 AND 4:1, SAID COMPOSITION CONTAINING FROM 10 TO 99 PARTS BY WEIGT OF RFCOOH AND CORRESPONDINGLY FROM 90 TO 1 PART BY WEIGHT OF RFCH2COOH.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein Rf is a perfluoroalkyl group of 6 to 12 carbon atoms.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the fluorinated constituent of acid types a and b are of different chain lengths.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein the ratio between RfCOOH and RfCH2COOH is not more than 9:1 by weight.
Claim 6
Dependent Claim
13 words
The composition of claim 4 wherein said ratio is not more than 4:1.
References Cited (Backward Citations)
US3287141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |