Patent US1688401A successfully refreshed from Google Patents.
US4526641A
Expired / Lapsed
US
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Method of making peelable non-metallic shims
Assignee: Boeing Co
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Filing: 1983-09-06
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Granted: 1985-07-02
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Expires: 2003-09-06
Abstract
Abstract A laminate of a plurality of thermosetting resin films are joined together with a thermosetting resin to impart a peel strength between films of about 1 to 3 pounds per inch of width.
Inventors
- 👤 Matthias P. Schriever
- 👤 Chun-Ming Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:32
CPC Classifications
F; F16; F16B; F16B43/00; B; B29; B29C; B29C65/00; B29C65/76; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/73; B29C66/739; B29C66/7394; B29C66/73941; B29C66/725; B29C66/7254; F16B11/00; F16B11/006; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1082; Y10T156/11; Y10T156/1105; Y10T156/19; Y10T156/1906; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A method of preparing a shaped shim, with steps comprising: determining the required shape for a shim to fill a void between structural members; selecting peelable shim stock of a laminate of polyimide films adhered together with a peel strength of 1 to 4 pounds per inch of width; scribing the polyimide film; peeling back the film and tearing it off at the scribed mark; and repeating the scribing, peeling and tearing thereby imparting a taper to the surface.
Claim 2
Independent Claim
79 words
A method of preparing a shaped shim, with steps comprising: determining the required shape for a shim to fill a void between structural members; selecting peelable shim stock of a laminate of polyimide films adhered together with a peel strength of 1 to 4 pounds per inch of width; scribing the polyimide film; peeling back the film and tearing it off at the scribed mark; and repeating the scribing, peeling and tearing thereby imparting a taper to the surface.
Claim 3
Dependent Claim
39 words
A method of preparing a shaped shim as in claim 1, with further steps comprising scribing, peeling and tearing from an opposite side of the peelable shim for tapering the opposite side to fit the shim to the void.
References Cited (Backward Citations)
US2124866A
Cited
US3852137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |