US3922230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oligomeric polyacrylates as builders in detergent compositions
Assignee: Lever Brothers Co
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Filing: 1974-04-15
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Granted: 1975-11-25
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Expires: 1994-04-15
Abstract
Abstract The present invention relates to a novel class of oligomeric builders for use in detergent compositions. More particularly, the present invention relates to a biodegradable, oligomeric polyacrylate having a molecular weight of greater than about 500 and less than about 10,000, preferably less than about 5000. In the most desirable embodiments at least one end of the oligomer chain is terminated with either a sulfur containing moiety or an hydroxy containing moiety. Preferred cations are alkali metals, ammonium and substituted ammonium.
Inventors
- 👤 Vincent Lamberti
- 👤 Chester R Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:36
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A DETERGENT COMPOSITION COMPRISING A WATER SOLUBLE DETERGENT COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANIONIC, NONIONIC, ZWITTERIONIC, AMPHOLYTIC DETERGENT COMPOUNDS AND MIXTURE THEREOF, AND A BUILDER SALT COMPRISING AN OLIGOMERIC POLYACRYLATE HAVING A MOLECULAR WEIGHT OF GREATER THAN ABOUT 500 AND LESS THAN ABOUT 10,000 REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
50 words
A DETERGENT COMPOSITION COMPRISING A WATER SOLUBLE DETERGENT COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANIONIC, NONIONIC, ZWITTERIONIC, AMPHOLYTIC DETERGENT COMPOUNDS AND MIXTURE THEREOF, AND A BUILDER SALT COMPRISING AN OLIGOMERIC POLYACRYLATE HAVING A MOLECULAR WEIGHT OF GREATER THAN ABOUT 500 AND LESS THAN ABOUT 10,000 REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
24 words
A detergent composition as defined in claim 1 wherein at least one end of the oligomer chain is terminated with a sulfur containing moiety.
Claim 4
Dependent Claim
24 words
A detergent composition as defined in claim 1 wherein at least one end of the oligomer chain is terminated with an hydroxy containing moiety.
Claim 5
Dependent Claim
25 words
A detergent composition as defined in claim 1 wherein the polyacrylate has a molecular weight of greater than about 500 and less than about 5000.
Claim 6
Dependent Claim
27 words
A detergent composition as defined in claim 1 wherein the oligomeric polyacrylate has an average molecular weight of greater than about 500 and less than about 5000.
Claim 7
Dependent Claim
13 words
A detergent composition as defined in claim 5 wherein the repeating acrylate moiety
Claim 8
Dependent Claim
31 words
A detergent composition as defined in claim 8 wherein R1 and R2 are selected from the group consisting of biodegradable alkyls, substituted alkyls, hydrogen and the residue from free radical initiators.
Claim 9
Dependent Claim
26 words
A detergent composition as defined in claim 5 wherein R3 is selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms.
Claim 10
Dependent Claim
27 words
A detergent composition as defined in claim 5 wherein the oligomeric polyacrylate has an average molecular weight of greater than about 500 and less than about 3000.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |