US2994664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry acid cleaning compositions
Assignee: ChampionX LLC
•
Filing: 1958-02-19
•
Granted: 1961-08-01
•
Expires: 1978-02-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Wachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/08; C11D7/22; C11D7/26; C11D7/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SOLID, ACID CLEANING COMPOSITION WHICH COMPRISES A BLEND OF (A) A HYDROXY SUBSTITYUTED CARBOXYLIC ACID, SAID ACID BEING SOLUBLE IN WATER AT 20*C., AS ITS CALCIUM SALT, TO THE EXTENT OF AT LEAST 500 PARTS PER MILLION AND HAVING A DISSOCIATION CONSTANT (K1) OF FROM 2X10-3 TO 1X10-5, AND (B) SULFAMIC ACID, THE WEIGHT RATIO OF (A) TO (B) BEING WITHIN THE RANGE OF 1:2 TO 2:1, SAID COMPOSITION CONTAINING FROM 2% TO 30% BY WEIGHT OF A CORROSION INHIBITOR.
Claim 2
Dependent Claim
81 words
A SOLID, ACID CLEANING COMPOSITION WHICH COMPRISES A BLEND OF (A) A HYDROXY SUBSTITYUTED CARBOXYLIC ACID, SAID ACID BEING SOLUBLE IN WATER AT 20*C., AS ITS CALCIUM SALT, TO THE EXTENT OF AT LEAST 500 PARTS PER MILLION AND HAVING A DISSOCIATION CONSTANT (K1) OF FROM 2X10-3 TO 1X10-5, AND (B) SULFAMIC ACID, THE WEIGHT RATIO OF (A) TO (B) BEING WITHIN THE RANGE OF 1:2 TO 2:1, SAID COMPOSITION CONTAINING FROM 2% TO 30% BY WEIGHT OF A CORROSION INHIBITOR.
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |