US3829381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron-and calcium-containing compositions and process
Assignee: Lubrizol Corp
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Filing: 1970-02-02
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Granted: 1974-08-13
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Expires: 1990-02-02
Abstract
Abstract BORON-AND CALCIUM-CONTAINING COMPOSITIONS USEFUL AS LUBRICANT AND FUEL ADDITIVES ARE PREPARED BY REACTING BORIC ACID WITH CERTAIN CARBONATED, CALCIUM OVERBASED PETROSULFONATES.
Inventors
- 👤 Suer W Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:19
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/04; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10L10/02; C10L10/18; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |