US4616060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield wiper material
Assignee: Ford Global Technologies LLC
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Filing: 1983-12-27
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Granted: 1986-10-07
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Expires: 2003-12-27
Abstract
Abstract This invention relates to an elastomer composition which is suitable for use as windshield wiper material. The composition comprises elastomer having a fully saturated backbone, curing agent for the elastomer in amounts sufficient to crosslink the elastomer, at least 25 weight percent particulate graphite, based on the weight of the elastomer and reinforcing particulate filler. The particulate graphite modifies the frictional properties of the elastomer. The composition has excellent weatherability and low friction and thus is ideally suitable for making windshield wiper blades.
Inventors
- 👤 Paul C. Killgoar, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:06
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; F; F16; F16B; F16B23/00; F16B23/0007; B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/32; B60S1/38; B60S2001/3827; B60S2001/3829
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
An elastomer composition which may be formed into windshield wiper blades and cured, characterized in that said composition comprises an intimate mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in an amount sufficient to crosslink said elastomer; (c) at least 25 parts by weight particulate graphite; and (d) reinforcing particulate filler.
Claim 2
Dependent Claim
63 words
An elastomer composition which may be formed into windshield wiper blades and cured, characterized in that said composition comprises an intimate mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in an amount sufficient to crosslink said elastomer; (c) at least 25 parts by weight particulate graphite; and (d) reinforcing particulate filler.
Claim 3
Dependent Claim
18 words
An elastomer composition according to claim 1, wherein said elastomer having a fully saturated backbone comprises ethylene-propylenediene rubber.
Claim 4
Dependent Claim
20 words
An elastomer composition according to claim 2, wherein said curing agent for said elastomer comprises an accelerated sulfur curing system.
Claim 5
Dependent Claim
24 words
An elastomer composition according to claim 2, wherein said composition comprises between about 50 and about 100 parts by weight of said particulate graphite.
Claim 6
Dependent Claim
14 words
An elastomer composition according to claim 1, wherein said reinforcing particulate comprises carbon black.
Claim 7
Dependent Claim
10 words
Windshield wiper blades made from the composition of claim 1.
Claim 8
Independent Claim
76 words
A method for making windshield wiper blades, which method comprises: (A) intimately mixing together a composition comprising: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in an amount sufficient to crosslink said elastomer; (c) at least 25 parts by weight particulate graphite; and (d) reinforcing particulate filler; (B) forming said composition into said windshield wiper blades; and (C) curing said composition of said windshield wiper blades.
Claim 9
Independent Claim
76 words
A method for making windshield wiper blades, which method comprises: (A) intimately mixing together a composition comprising: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in an amount sufficient to crosslink said elastomer; (c) at least 25 parts by weight particulate graphite; and (d) reinforcing particulate filler; (B) forming said composition into said windshield wiper blades; and (C) curing said composition of said windshield wiper blades.
Claim 10
Dependent Claim
22 words
A method for making windshield wiper blades according to claim 7, wherein said elastomer having a fully saturated backbone comprises ethylene-propylenediene rubber.
Claim 11
Dependent Claim
24 words
A method for making windshield wiper blades according to claim 8, wherein said curing agent for said elastomer comprises an accelerated sulfur curing system.
Claim 12
Dependent Claim
28 words
A method for making windshield wiper blades according to claim 8, wherein said composition comprises between about 50 and about 100 parts by weight of said particulate graphite.
Claim 13
Dependent Claim
18 words
A method for making windshield wiper blades according to claim 7, wherein said reinforcing particulate comprises carbon black.
Claim 14
Dependent Claim
11 words
Windshield wiper blades made according to the method of claim 7.
References Cited (Backward Citations)
US267594A
Cited
US2035988A
Cited
US3080596A
Cited
US3171699A
Cited
GB1147577A
Cited
US3384580A
Cited
US4103385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |