US3810836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-staining drill lubricants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-06-01
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Granted: 1974-05-14
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Expires: 1992-06-01
Abstract
Abstract A MINERAL-OIL-BASED LUBRICANT FOR USE IN DRILLING OF MINERAL ORE DEPOSITS, WHICH IS NON-STAINING TOWARDS SAMPLE CORES WITHDRAWN DURING THE DRILLING, CAN BE PREPARED BY COMBINING A PARAFFINIC OIL, WITH MINOR AMOUNTS OF A NONIOMIC EMULSIFIER PACKAGE AND A SULFUR-CONTAINING EXTREME PRESSURE AGENT. THE NONIONIC EMULSIFIER PACKAGE CAN BE A COMBINATION OF AN ALKOXYLATED FATTY ACID ESTER AND AN ALKOXYLATED ALKYL PHENOL OR A COMBINATION OF FATTY ACID SORBITAN POLYESTERS WHICH HAVE BEEN ALKOXYLATED TO VARYING EXTENTS.
Inventors
- 👤 J Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; C10; C10M; C10M167/00; C10M2201/00; C10M2201/02; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/08; C10M2219/082; C10M2219/083; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |