Patent US4601952A successfully refreshed from Google Patents.
US4601952A
Expired / Lapsed
US
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High density moisture resistant mica sheet
Assignee: Suflex Inc
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Filing: 1985-09-16
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Granted: 1986-07-22
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Expires: 2005-09-16
Abstract
Abstract The present invention comprises a high density, moisture resistant, high temperature stable mica laminate. Said laminate comprises a plurality of mica papers, impregnated with a polysiloxane binder containing a titanate and naphthenate. A process of preparing said mica laminates is also disclosed. The laminates of this invention have exceptional structureal qualities, moisture resistance, stain resistance, and densities of 1.5 g/cc or greater.
Inventors
- 👤 Arthur F. Doyle
- 👤 Dennis J. Sklarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:50
CPC Classifications
B; B32; B32B; B32B19/00; B32B19/02; D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/44; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59; D21H27/00; D21H27/30; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/29; Y10T428/2911
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A mica composite laminate comprising: a plurality of papers consisting essentially of mica, each impregnated with about 5% to about 14% by weight of a polysiloxane binder; said binder containing about 1% to about 4% by weight of a titanate and about 0.5% to about 2% by weight of a naphthenate, wherein the composite has a density greater than about 1.5 g/cc and can withstand immersion in boiling water for 1 hour without delaminating.
Claim 2
Dependent Claim
74 words
A mica composite laminate comprising: a plurality of papers consisting essentially of mica, each impregnated with about 5% to about 14% by weight of a polysiloxane binder; said binder containing about 1% to about 4% by weight of a titanate and about 0.5% to about 2% by weight of a naphthenate, wherein the composite has a density greater than about 1.5 g/cc and can withstand immersion in boiling water for 1 hour without delaminating.
Claim 3
Dependent Claim
20 words
The article of claim 1 wherein said article has a thickness of from about 0.0100 inch to about 2 inches.
Claim 4
Dependent Claim
26 words
The article of claim 1 wherein the polysiloxane is methylphenyl polysiloxane or methyl polysiloxane, the titanate is monoalkoxy pyrophosphato titanate and the naphthenate is zinc naphthenate.
References Cited (Backward Citations)
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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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |