US3787492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-soluble condensation products of alpha-nitro alkyl chlorides and polyamino ureas,and the method of preparing same
Assignee: BP Corp North America Inc
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Filing: 1971-12-06
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Granted: 1974-01-22
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Expires: 1991-12-06
Abstract
Abstract OIL-SOLUBLE PRODUCTS USEFUL AS LUBRICATING OIL ADDITIVE TO IMPART DETERGENCY AND DISPERSANT PROPERTIES THERETO ARE PREPARED BY THE CONDENSATION OF ALPHA-NITRO ALKYL CHLORIDES, HAVING AT LEAST 10 CARBON ATOMS IN THE ALKYL SUBSTITUENT, WITH POLYAMINO UREAS IN THE MOLAR RATIO OF FROM ABOUT 1.0:0.5 TO ABOUT 1.0:1.0, RESPECTIVELY.
Inventors
- 👤 R Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:08
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C201/00; C07C201/06; C07C201/14; C07G; C07G99/00; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2070/00; C10N2070/02
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |