US4787993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant
Assignee: Mitsui Toatsu Chemicals Inc
•
Filing: 1987-07-02
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Granted: 1988-11-29
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Expires: 2007-07-02
Abstract
Abstract This invention provides lubricants which perform stable operation even at high temperatures and under heavy loading. The lubricants are prepared by dispersing at least one of finely powdered resin selected from aromatic resin and polyimide resin into the fluid fats and oils. The flowable fats and oils may further contain molybdenum disulfide, organic molybdenum, boron nitride, or PTFE.
Inventors
- 👤 Taizo Nagahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/06; C10M145/00; C10M145/18; C10M149/00; C10M149/12; C10M151/00; C10M151/02; C10M161/00; C10M2201/00; C10M2201/06; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/084; C10M2201/18; C10M2209/00; C10M2209/10; C10M2213/00; C10M2213/02; C10M2217/00; C10M2217/04; C10M2221/00; C10M2221/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
39 words
A lubricant which comprises dispersing 0.001-50% by weight of at least one finely powdered resin selected from the group consisting of polyphenylene sulfides, polycarbonates, polysulfones, polyetherimides, polyether ketones, polyetherether ketones, polyether sulfones and polyarylates into fluids fats and oils.
Claim 2
Dependent Claim
39 words
A lubricant which comprises dispersing 0.001-50% by weight of at least one finely powdered resin selected from the group consisting of polyphenylene sulfides, polycarbonates, polysulfones, polyetherimides, polyether ketones, polyetherether ketones, polyether sulfones and polyarylates into fluids fats and oils.
Claim 3
Dependent Claim
14 words
The lubricant as claimed in claim 1 wherein said selected resin is polyetherether ketone.
Claim 4
Dependent Claim
17 words
The lubricant as claimed in claim 2 wherein the fluid fats and oils further contains molybdenum disulfide.
Claim 5
Dependent Claim
17 words
The lubricant as claimed in claim 2 wherein the fluid fats and oils further contains boron nitride.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |