US2814612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea adducts
Assignee: BP PLC
•
Filing: 1953-12-02
•
Granted: 1957-11-26
•
Expires: 1973-12-02
Abstract
No abstract record available.
Inventors
- 👤 Desty Dennis Henry
- 👤 Harbourn Charles Leslie Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:46
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/0082; C11D1/00; C11D1/66; C11D1/72; C11D3/00; C11D3/16; C11D3/26; C11D3/32; C11D3/323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PRODUCTION OF SOLID NON-IONIC SURFACE ACTIVE AGENTS, WHICH COMPRISES MIXING WITH SULPHUR DIOXIDE A LIQUID NON-IONIC SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA R-COO-(CH3CH2O)N-CH2-CH3-OH WHERE R IS A LONG CHAIN ALKYL GROUP CONTAINING FROM 5 TO 50 CARBON ATOMS AND N IS AN INTEGER IN THE RANGE OF 5 TO 50, COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PRODUCTION OF SOLID NON-IONIC SURFACE ACTIVE AGENTS, WHICH COMPRISES MIXING WITH SULPHUR DIOXIDE A LIQUID NON-IONIC SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA R-COO-(CH3CH2O)N-CH2-CH3-OH WHERE R IS A LONG CHAIN ALKYL GROUP CONTAINING FROM 5 TO 50 CARBON ATOMS AND N IS AN INTEGER IN THE RANGE OF 5 TO 50, COMPOUNDS HAVING THE FORMULA
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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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |