US3767439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functional surface coating compositions for cellulosic material
Assignee: Individual
•
Filing: 1972-01-31
•
Granted: 1973-10-23
•
Expires: 1992-01-31
Abstract
Abstract Functional surface coating compositions, prepared by blending a mixture of a fluorine-containing phosphate material and a nonfluorine-containing material in aqueous medium, impart solvent, grease and oil resistance to cellulosic materials.
Inventors
- 👤 R Moyer
- 👤 M Uffner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:09
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
The functional surface coating composition of claim 1 in which the fluorine-containing phosphate material is the diethanolamine salt of the equimolar mixture of mono- and bis-(1,1-dihydroperfluorocyclohexylmethyl) phosphates.
Claim 2
Dependent Claim
24 words
The functional surface coating composition of claim 1 in which the fluorine-containing phosphate material is a mixture of ammonium bis- and mono-(N-ethyl-2-perfluoroalkylsulfonamide ethyl) phosphates.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |