US4071476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent builders and composition containing the same
Assignee: Texaco Inc
•
Filing: 1976-09-30
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Granted: 1978-01-31
•
Expires: 1996-09-30
Abstract
Abstract Disclosed and claimed are biodegradable builders for use with water-soluble organic detergent compounds. The builders are alkali metal salts of ester-acids derived from polycarboxylic acid anhydrides. Also claimed are a method for making the compounds and detergent compositions containing the disclosed compounds.
Inventors
- 👤 John A. Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:26
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/34; C11D3/3472; C07; C07C; C07C309/00; C11D3/20; C11D3/2075; C11D3/2082
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
25 words
A detergent builder selected from the group consisting of sodium carboxymethyl phthalate, sodium carboxymethyl tetrahydrophthalate, sodium carboxymethyl hexahydrophthalate, sodium carboxymethyl maleate and sodium sulfoethyl maleate.
Claim 2
Dependent Claim
25 words
A detergent builder selected from the group consisting of sodium carboxymethyl phthalate, sodium carboxymethyl tetrahydrophthalate, sodium carboxymethyl hexahydrophthalate, sodium carboxymethyl maleate and sodium sulfoethyl maleate.
Claim 3
Dependent Claim
61 words
A detergent composition consisting essentially of 3.5 to 4.5 by weight of a water-soluble surface active agent selected from the group consisting of of anionic, zwitterionic, ampholytic surfactants and mixtures thereof, 1.5 to 10 percent by weight of a hydrotrope; and from about 5 to 95 percent by weight of the total composition of a builder as defined in claim 1.
References Cited (Backward Citations)
US2028091A
Cited
US3844982A
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US3812044A
Cited
US3798183A
Cited
US3920569A
Cited
US3799970A
Cited
US3915879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |