Patent US3956401A successfully refreshed from Google Patents.
US3956401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low foaming, biodegradable, nonionic surfactants
Assignee: Olin Corp
•
Filing: 1975-03-10
•
Granted: 1976-05-11
•
Expires: 1995-03-10
Abstract
Abstract Low foaming biodegradable, liquid, non-gelling and nonionic surfactants are claimed having the formula: RO-(CH2-CH-O)x-(CH2-CH2-O)y-(CH2-CH-O)z-H s,104 ¦ ¦ R'R'' wherein R is a linear, alkyl hydrocarbon having an average from about 7 to 10 carbon atoms, R' is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, R'' is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, x is an integer of about 1 to about 6, y is an integer of about 4 to about 15 and z is an integer of about 4 to 25.
Inventors
- 👤 Michael Scardera
- 👤 Robert N. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:54
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/11; C09; C09K; C09K23/00; C09K23/42; C11; C11D; C11D1/00; C11D1/66; C11D1/722; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
A surfactant product having the forumula: ##EQU3## wherein R is a linear, alkyl hydrocarbon having an average of from about 7 to about 10 carbon atoms, R' is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, R" is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, x is an integer of about 1 to about 6, y is an integer of about 4 to about 15, and z is an integer of about 4 to about 25.
Claim 2
Dependent Claim
85 words
A surfactant product having the forumula: ##EQU3## wherein R is a linear, alkyl hydrocarbon having an average of from about 7 to about 10 carbon atoms, R' is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, R" is a linear, alkyl hydrocarbon of about 1 to about 4 carbon atoms, x is an integer of about 1 to about 6, y is an integer of about 4 to about 15, and z is an integer of about 4 to about 25.
Claim 3
Dependent Claim
18 words
The surfactant product of claim 1 wherein R has an average of about 8 to 9 carbon atoms.
Claim 4
Dependent Claim
15 words
The surfactant product of claim 1 wherein R' has about 1 to 2 carbon atoms.
Claim 5
Dependent Claim
15 words
The surfactant product of claim 1 wherein R" has about 1 to 2 carbon atoms.
Claim 6
Dependent Claim
18 words
The surfactant product of claim 1 wherein both R' and R" have about 1 to 2 carbon atoms.
Claim 7
Dependent Claim
14 words
The surfactant product of claim 5 wherein both R' and R" are methyl groups.
Claim 8
Dependent Claim
26 words
The surfactant product of claim 1 wherein x is about 2 to 4, y is about 5 to 12 and z is about 6 to 20.
Claim 9
Dependent Claim
18 words
The surfactant product of claim 7 wherein both R' and R" have about 1 to 2 carbon atoms.
Claim 10
Dependent Claim
13 words
The surfactant product of claim 8 wherein R' and R" are methyl groups.
Claim 11
Dependent Claim
18 words
The surfactant product of claim 9 wherein R has an average of about 8 to 9 carbon atoms.
Claim 12
Dependent Claim
10 words
The surfactant product of claim 10 wherein x is 3.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |