Patent US4803005A successfully refreshed from Google Patents.
US4803005A
Expired / Lapsed
US
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Perfluoropolyether solid fillers for lubricants
Assignee: Exfluor Research Corp
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Filing: 1986-08-06
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Granted: 1989-02-07
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Expires: 2006-08-06
Abstract
Abstract Lubricants comprising perfluoropolyether oils containing perfluoropolyether solids as fillers are described.
Inventors
- 👤 Timothy J. Juhlke
- 👤 Thomas R. Bierschenk
- 👤 Richard J. Lagow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:16
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/02; C10M107/00; C10M107/38; C10M119/00; C10M119/22; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
16 words
A lubricant comprising a perfluoropolyether oil and about 20-70 percent by weight perfluoropolyether solid as filler.
Claim 2
Dependent Claim
16 words
A lubricant comprising a perfluoropolyether oil and about 20-70 percent by weight perfluoropolyether solid as filler.
Claim 3
Dependent Claim
16 words
A lubricant of claim 1, wherein the weight percent of perfluoropolyether solid is about 20-40 percent.
Claim 4
Dependent Claim
18 words
A lubricant of claim 1, wherein the oil and the solid are polymers of the same chemical structure.
Claim 5
Dependent Claim
26 words
A lubricant of claim 1, wherein the perfluoropolyether oil or solid is selected from the group consisting of perfluoropoly(ethylene oxide) perfluoropoly(propylene oxide), and perfluoropoly(methylene oxide-ethylene oxide).
Claim 6
Dependent Claim
19 words
A lubricant of claim 1 wherein the perfluoropolyether solid is in the form of particles of about 200 mesh.
Claim 7
Dependent Claim
16 words
A lubricant comprising perfluoropoly(ethylene oxide) oil base and about 20-70 percent by weight perfluoropoly(ethylene oxide) solid.
Claim 8
Dependent Claim
16 words
A lubricant comprising perfluoropoly(ethylene oxide) oil base and about 20-70 percent by weight perfluoropoly(ethylene oxide) solid.
Claim 9
Dependent Claim
17 words
A lubricant of claim 6, wherein the weight percent of perfluoropoly(ethylene oxide) solid is about 20-40 percent.
Claim 10
Dependent Claim
20 words
A lubricant comprising a perfluoropoly(propylene oxide) base oil and about 20-70 percent by weight perfluoropoly (propylene oxide) solid as filler.
Claim 11
Dependent Claim
20 words
A lubricant comprising a perfluoropoly(propylene oxide) base oil and about 20-70 percent by weight perfluoropoly (propylene oxide) solid as filler.
Claim 12
Dependent Claim
17 words
A lubricant of claim 8, wherein the weight percent of perfluoropoly(ethylene oxide) solid is about 20-40 percent.
Claim 13
Dependent Claim
20 words
A lubricant comprising perfluoropoly(methylene oxide-ethylene oxide) base oil and about 20-70 percent by weight perfluoropoly(methylene oxide-ethylene oxide) solid as filler.
Claim 14
Dependent Claim
20 words
A lubricant comprising perfluoropoly(methylene oxide-ethylene oxide) base oil and about 20-70 percent by weight perfluoropoly(methylene oxide-ethylene oxide) solid as filler.
Claim 15
Dependent Claim
17 words
A lubricant of claim 10, wherein the weight percent of perfluoropoly(ethylene oxide) solid is about 20-40 percent.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |