US2860106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea-phosphoric acid cleaning composition
Assignee: EF Drew and Co Inc
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Filing: 1952-10-01
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Granted: 1958-11-11
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Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Lawrence L Little
- 👤 Chen Gilmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:39
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0047; C11D3/16; C11D3/26; C11D3/32; C11D3/323; C11D7/00; C11D7/02; C11D7/04; C11D7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN ACID CLEANING COMPOSITION COMPRISING A MIXTURE OF THE CRYSTALINE ADDITION PRODUCT OF UREA AND PHOSPHORIC ACID, SAID PRODUCT HAVING A PH BELOW 4,7, THE RATIO OF UREA TO CONCENTRATED PHOSPHORIC ACID BY WEIGHT BEING ABOUT 1 TO 2, WITH A WETTING AGENT TAKEN FROM THE CLASS CONSISTING OF QUATENARY AMMONIUM CATIONIC WETTING AGENTS AND POLYGLYCOL ETHER NON-IONIC WETTING AGENTS HAVING 10 TO 100 GLYCOL RADICALS.
Claim 2
Dependent Claim
66 words
AN ACID CLEANING COMPOSITION COMPRISING A MIXTURE OF THE CRYSTALINE ADDITION PRODUCT OF UREA AND PHOSPHORIC ACID, SAID PRODUCT HAVING A PH BELOW 4,7, THE RATIO OF UREA TO CONCENTRATED PHOSPHORIC ACID BY WEIGHT BEING ABOUT 1 TO 2, WITH A WETTING AGENT TAKEN FROM THE CLASS CONSISTING OF QUATENARY AMMONIUM CATIONIC WETTING AGENTS AND POLYGLYCOL ETHER NON-IONIC WETTING AGENTS HAVING 10 TO 100 GLYCOL RADICALS.
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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |