Patent US4744851A successfully refreshed from Google Patents.
US4744851A
Expired / Lapsed
US
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Method of producing rubber sheets having clean areas
Assignee: Goodyear Tire and Rubber Co
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Filing: 1987-03-10
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Granted: 1988-05-17
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Expires: 2007-03-10
Abstract
Abstract There is provided a method of producing rubber sheeting having a top surface and a bottom surface wherein an area of at least one of said surfaces is protected against surface contamination, comprised of: (a) applying to said area of uncured rubber sheeting a releasable strip of material prior to the uncured rubber sheeting being exposed to surface contamination, and (b) curing said uncured rubber sheeting with the releasable strip attached. There is also provided a rubber sheet having a top surface and a bottom surface wherein an area of at least one of said surfaces has been protected against surface contamination by the method above.
Inventors
- 👤 Harold K. Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/06; B; B29; B29C; B29C33/00; B29C33/56; B29C33/68; B29C37/00; B29C37/0067; B29C37/0075; B29C63/00; B29C63/0017; B29D; B29D7/00; B29K; B29K2023/00; B29K2023/16; B29K2105/00; B29K2105/24; B29K2105/243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A method of producing rubber sheeting having a top surface and a bottom surface wherein an area of at least one of said surfaces is protected against surface contamination comprising the steps of: (a) providing an uncured rubber sheeting, (b) applying to an area of said uncured rubber sheeting a releasable strip of material prior to the uncured rubber sheeting being exposed to surface contamination and (c) curing said uncured rubber sheeting with the releasable strip attached, wherein the releasable strip of material is an internally delustered polymerically plasticized solution cast polyvinyl chloride film.
Claim 2
Independent Claim
94 words
A method of producing rubber sheeting having a top surface and a bottom surface wherein an area of at least one of said surfaces is protected against surface contamination comprising the steps of: (a) providing an uncured rubber sheeting, (b) applying to an area of said uncured rubber sheeting a releasable strip of material prior to the uncured rubber sheeting being exposed to surface contamination and (c) curing said uncured rubber sheeting with the releasable strip attached, wherein the releasable strip of material is an internally delustered polymerically plasticized solution cast polyvinyl chloride film.
Claim 3
Dependent Claim
19 words
The method according to claim 1 wherein the film has a thickness from 13 micrometers to about 38 micrometers.
Claim 4
Dependent Claim
20 words
The method according to claim 2 wherein the film has a thickness of from 19 micrometers to about 32 micrometers.
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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |