US3726882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ashless oil additives
Assignee: BP Corp North America Inc
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Filing: 1970-10-15
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Granted: 1973-04-10
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Expires: 1990-10-15
Abstract
Abstract THIS INVENTION CONCERNS THE CONDENSATION PRODUCT OF AN ALDEHYDE REACTANT HAVING MORE THAN ONE CARBON ATOM AND/OR KETONE REACTANT, FORMALDEHYDE, AN ALKYLENE POLYAMINE, AN ALKYL-SUBSTITUTED PHENOL, AND A METHYL-SUBSTITUTED AMINOPYRIDINE. THESE COMPOSITIONSCAN BE USED AS ASHLESS ALKALINE ADDITIVES FOR LUBRICATING OILS.
Inventors
- 👤 T Traise
- 👤 R Watson
- 👤 R Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:40
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C10; C10M; C10M159/00; C10M159/12; C10M159/16; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06
Claims Analysis
Total Claims: 0
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |