Patent US4036822A successfully refreshed from Google Patents.
US4036822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing material
Assignee: Federal Mogul Engineering Ltd
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Filing: 1975-09-30
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Granted: 1977-07-19
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Expires: 1995-09-30
Abstract
Abstract This invention is a method of curing polyphenylene sulphide polymer to produce a plain bearing lining material in which an oxide of manganese or cadmium, is included with the polymer powder to accelerate the curing process by catalytic action and by the release of oxygen within the body of the material.
Inventors
- 👤 Padma Ambalal Patel
- 👤 Dennis Stanley Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:00
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A method of making a bearing lining by curing an arylene sulphide polymer by heating the same in the presence of an oxide of a metal selected from the group consisting of cadmium and manganese, in a proportion between 0.5% and 5.0% by weight of the lining, in which method the heating accelerates the curing and acts of liberate oxygen which assists in achieving cross linking.
Claim 2
Independent Claim
66 words
A method of making a bearing lining by curing an arylene sulphide polymer by heating the same in the presence of an oxide of a metal selected from the group consisting of cadmium and manganese, in a proportion between 0.5% and 5.0% by weight of the lining, in which method the heating accelerates the curing and acts of liberate oxygen which assists in achieving cross linking.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, in which the lining has a thickness of from 0.01 inch to 0.02 inch.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 1 in which the polymer is polyphenylene sulphide.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 3 in which the oxide is manganese dioxide.
Claim 6
Dependent Claim
23 words
A method as claimed in claim 4 in which the manganese dioxide is in a proportion of 3% by weight of the lining.
Claim 7
Dependent Claim
14 words
A method as claimed in claim 3 in which the oxide is cadmium oxide.
Claim 8
Dependent Claim
24 words
A method as claimed in claim 6 in which the cadmium oxide is present in a proportion of 1% by weight of the lining.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 3 in which the curing temperature is about 370° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |