US3899484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated phosphates
Assignee: Pennwalt Corp
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Filing: 1974-04-08
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Granted: 1975-08-12
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Expires: 1994-04-08
Abstract
Abstract Fluorinated phosphates of the structure ARE DISCLOSED HEREIN. These compounds are useful in the treatment of paper stock.
Inventors
- 👤 Gerald Joseph Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:55
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C07C; C07C323/00; C07C323/23; C07C323/24; C07C323/25; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/3868; C08G18/387; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
A FLUORINATED PHOSPHATE OF THE STRUCTURE
Claim 2
Dependent Claim
6 words
A FLUORINATED PHOSPHATE OF THE STRUCTURE
Claim 3
Dependent Claim
10 words
A phosphate according to claim 1 wherein n is 2.
Claim 4
Dependent Claim
10 words
A phosphate according to claim 1 wherein Rf is perfluoroalkyl.
Claim 5
Dependent Claim
10 words
A phosphate according to claim 3 wherein n is 2.
Claim 6
Dependent Claim
10 words
A phosphate according to claim 4 wherein Rf is (CF3)2CF(CF2)6.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |