US3692884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate esters
Assignee: EDWIN R GASKELL
•
Filing: 1969-02-07
•
Granted: 1972-09-19
•
Expires: 1989-02-07
Abstract
Abstract A novel group of compounds, the reaction product of an amine and a phosphate ester that are useful as dispersing agents for the finely divided metal oxides used in preparing magnetic tape coatings. The compound having the formula: WHERE R is a hydrocarbon radical; A is an alkylene radical; R'' is an amine; and the sum of x, y and z is 3.
Inventors
- 👤 Edwin R Gaskell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/7013; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/22; C07F9/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
30 words
A composition according to claim 1 wherein A and A'' are ethylene, m is 0-3, n is 6-15 and R is an alkyl radical of from 10 to 20 carbons.
Claim 2
Dependent Claim
18 words
A composition according to claim 1, wherein m is 2, n is about 4 and R is dodecyl.
Claim 3
Dependent Claim
18 words
A composition according to claim 1, wherein m is 3, n is about 8 and R is pentadecyl.
Claim 4
Dependent Claim
32 words
A composition according to claim 1, wherein R is an alkylaromatic radical of from 10 to 20 carbons, n is an integer of from 6-15, and A and A'' are ethylene radicals.
Claim 5
Dependent Claim
18 words
A composition according to claim 5, wherein m is 3, n is about 10 and R is nonylphenyl.
Claim 6
Dependent Claim
18 words
A composition according to claim 5, wherein m is 2, n is about 10 and R is nonylphenyl.
Claim 7
Dependent Claim
18 words
A composition according to claim 5, wherein m is 3, n is about 11 and R is octylphenyl.
Claim 8
Dependent Claim
18 words
A composition according to claim 5, wherein m is 0, n is about 10 and R is nonylphenyl.
Claim 9
Dependent Claim
16 words
A composition according to claim 5, wherein m is an integer of from 2 to 3.
Claim 10
Dependent Claim
10 words
A composition according to claim 5, wherein m is 0.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |