US3865813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiourea-acylated polyamine reaction product
Assignee: Lubrizol Corp
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Filing: 1970-09-02
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Granted: 1975-02-11
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Expires: 1990-09-02
Abstract
Abstract Process for post-treating certain ashless dispersants prepared from high molecular weight carboxylic acid acylating agents and polyamines with thiourea and certain reaction products thereby produced. The products are useful additives for lubricants and fuels.
Inventors
- 👤 William C Gergel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
C; C08; C08G; C08G73/00; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10M; C10M1/00; C10M1/08; C10M2221/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS COMPRISING REACTING (A) A POLYISOBUTENYLSUBSTITUTED SUCCINIC ACID ACYLATED ETHYLENE POLYYAMINE MIXTURE CHARACTERIZED BY AN EQUIVALENT RATIO OF ACID TO POLYAMINE OF ABOUT 1:1 TO 1:1.5, WHEREIN THE POLYYISOBUTENYL SUBSTITUENT HAS AN AVERAGE MOLECULAR WEIGHT OF ABOUT 800-1,100, AND (B) THIOUREA, THE TOTAL AMOUNT OF THIOUREA EMPLOYED IN THE REACTION MIXTURE BEING SUCH THAT THE RATIO OF EQUIVALENTS OF THIOUREA TO ACYLATED ETHYLENE POLYAMINE IS ABOUT 1-2:1-1.5.
Claim 2
Dependent Claim
68 words
THE PROCESS COMPRISING REACTING (A) A POLYISOBUTENYLSUBSTITUTED SUCCINIC ACID ACYLATED ETHYLENE POLYYAMINE MIXTURE CHARACTERIZED BY AN EQUIVALENT RATIO OF ACID TO POLYAMINE OF ABOUT 1:1 TO 1:1.5, WHEREIN THE POLYYISOBUTENYL SUBSTITUENT HAS AN AVERAGE MOLECULAR WEIGHT OF ABOUT 800-1,100, AND (B) THIOUREA, THE TOTAL AMOUNT OF THIOUREA EMPLOYED IN THE REACTION MIXTURE BEING SUCH THAT THE RATIO OF EQUIVALENTS OF THIOUREA TO ACYLATED ETHYLENE POLYAMINE IS ABOUT 1-2:1-1.5.
References Cited (Backward Citations)
US3312619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |