US2921908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequestering composition containing a corrosion inhibitor
Assignee: Procter and Gamble Co
•
Filing: 1956-07-02
•
Granted: 1960-01-19
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Homer W Mccune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:41
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0073; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C11D1/00; C11D1/02; C11D1/34; C11D1/345; C11D9/00; C11D9/04; C11D9/22; C11D9/30; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1673
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
A SEQUESTERING COMPOSITION OF INHIBITED CORROSIVENESS, AS USED IN DILUTE AQUEOUS ALKALINE MEDIUM, TOWARD ALUMIUUM, ZINC AND GERMAN SILVER, CONSISTING ESSENTIALLY OF A CALCIUM SEQUESTERING AMINO POLYCARBOXYLATE WHICH IS A SOLUBLE SALT OF AN AMINO POLYCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE TETRA CARBOXYLIC ACID, HYDROXY ALKYL ETHYLENE DIAMINE TRICARBOXYLIC ACID, AND NITRILO TRICARBOXYLIC ACID IN WHICH THE CARBOXYLIC ACIDS CONTAIN 2 VARBON ATOMS, AND AS AN INHIBITOR OF CORROISON A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
78 words
A SEQUESTERING COMPOSITION OF INHIBITED CORROSIVENESS, AS USED IN DILUTE AQUEOUS ALKALINE MEDIUM, TOWARD ALUMIUUM, ZINC AND GERMAN SILVER, CONSISTING ESSENTIALLY OF A CALCIUM SEQUESTERING AMINO POLYCARBOXYLATE WHICH IS A SOLUBLE SALT OF AN AMINO POLYCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE TETRA CARBOXYLIC ACID, HYDROXY ALKYL ETHYLENE DIAMINE TRICARBOXYLIC ACID, AND NITRILO TRICARBOXYLIC ACID IN WHICH THE CARBOXYLIC ACIDS CONTAIN 2 VARBON ATOMS, AND AS AN INHIBITOR OF CORROISON A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
28 words
THE COMPOSITION OF CLAIM 1 IN COMBINATION WITH A DETERGENT SELECTED FROM THE GROUP CONSISTING OF SOLUBLE SOAPS, ANIONIC NON-SOAP SYNTHETIC DETERGENTS, NONIONIC SYNTHETIC DETERGENTS, AND MIXTURES THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |