US3634515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene polyamide formaldehyde
Assignee: Standard Oil Co
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Filing: 1968-11-08
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Granted: 1972-01-11
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Expires: 1988-11-08
Abstract
Abstract THIS INVENTION CONCERNS THE CONDENSATION PRODUCT OF A HIGHER MOLECULAR WEIGHT ALKYL-SUBSTITUTED PHENOL, AN ALKYLENE POLYAMINE, FORMALDEHYDE, AND AN ALDEHYDE REACTANT HAVING MORE THAN ONE CARBON ATOM OR KETON REACTANT OR A MIXTURE OF BOTH REACTANTS. THESE PRODUCTS ARE USEFUL AS ASHLESS DISPERSANTS FOR LUBRICANTS.
Inventors
- 👤 Edmund J Piasek
- 👤 Robert E Karll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/14; C08G14/02; C08G14/04; C08G14/06; C10; C10M; C10M159/00; C10M159/12; C10M159/16; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/062; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |