US3721627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Builder for phosphate-free detergent compositions
Assignee: Primerica Inc
•
Filing: 1970-12-07
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Granted: 1973-03-20
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Expires: 1990-12-07
Abstract
Abstract A detergent composition including an anionic or non-ionic surfactant and a novel, hydrophilic but water-insoluble building agent comprising natural cellulose fibers having chemically bonded therein and thereon by in situ polymerization, an alkali salt of polyacrylic acid or polymethacrylic acid.
Inventors
- 👤 J Adams
- 👤 H Hoftiezer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:16
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3788; Y; Y10; Y10S; Y10S252/00; Y10S252/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
A detergent composition according to claim 1 wherein R is hydrogen.
Claim 2
Dependent Claim
21 words
A detergent composition according to claim 2 wherein said fibrous building agent is in the form of a finely divided powder.
Claim 3
Dependent Claim
13 words
A detergent composition according to claim 2 wherein said polymer comprises sodium polyacrylate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |