US3928708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent fire resistant polymeric structures
Assignee: National Aeronautics and Space Administration
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Filing: 1974-01-29
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Granted: 1975-12-23
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Expires: 1994-01-29
Abstract
Abstract Transparent impact-, heat- and fire-resistant polymeric materials for making windows, windshields and plane canopies are provided wherein the polymeric materials comprise an exposy resin cured with an alkoxy boroxine catalyst and a polycarbonate resin, preferably a polyphenolphthalein carbonate resin. Laminates including the advantages of both resins comprise a transparent layer of epoxy resin and a transparent layer of a polycarbonate resin joined together with a transparent adhesive interlayer.
Inventors
- 👤 George M Fohlen
- 👤 John A Parker
- 👤 Paul M Sawko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/36; B32B27/365; B32B27/38; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4078; B32B2250/00; B32B2250/24; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/554; B32B2307/558; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
9 words
A TRANSPARENT HEAT-, FIRE- AND IMPACT-RESISTANT LAMINATE STRUCTURE COMPRISING:
Claim 2
Dependent Claim
9 words
A TRANSPARENT HEAT-, FIRE- AND IMPACT-RESISTANT LAMINATE STRUCTURE COMPRISING:
Claim 3
Dependent Claim
18 words
A HEAT RESISTANT LAYER OF AN EPOXY RESIN CURED TO A HARD SOLID WITH AN ALKOXY BOROXIME CATALYST,
Claim 4
Dependent Claim
18 words
A HEAT RESISTANT LAYER OF AN EPOXY RESIN CURED TO A HARD SOLID WITH AN ALKOXY BOROXIME CATALYST,
Claim 5
Dependent Claim
22 words
A LAYER OF HIGH IMPACT STRENGTH AROMATIC POLYCARBONATE RESIN SELECTED FROM A POLYBISPHENOL A CARBONATE RESIN OR A POLYPHENOLPHALEIN CARBONATE RESIN, AND
Claim 6
Dependent Claim
22 words
A LAYER OF HIGH IMPACT STRENGTH AROMATIC POLYCARBONATE RESIN SELECTED FROM A POLYBISPHENOL A CARBONATE RESIN OR A POLYPHENOLPHALEIN CARBONATE RESIN, AND
Claim 7
Dependent Claim
15 words
The structure of claim 1, wherein the epoxy resin is a diglycidyl of bisphenol A.
Claim 8
Dependent Claim
22 words
a layer of high impact strength aromatic polycarbonate resin selected from a polybisphenol A carbonate resin or a polyphenolphthalein carbonate resin, and
Claim 9
Dependent Claim
22 words
a layer of high impact strength aromatic polycarbonate resin selected from a polybisphenol A carbonate resin or a polyphenolphthalein carbonate resin, and
Claim 10
Dependent Claim
19 words
a layer of high impact strength polyphenolphthalein carbonate resin having a molecular weight ranging from 30,000 to 100,000, and
Claim 11
Dependent Claim
19 words
a layer of high impact strength polyphenolphthalein carbonate resin having a molecular weight ranging from 30,000 to 100,000, and
Claim 12
Dependent Claim
18 words
intermediate said layers, an adhesive transparent interlayer comprising a block copolymer of dimethyl siloxane and bisphenol A polycarbonate.
Claim 13
Dependent Claim
18 words
intermediate said layers, an adhesive transparent interlayer comprising a block copolymer of dimethyl siloxane and bisphenol A polycarbonate.
Claim 14
Dependent Claim
8 words
intermediate said layers, a transparent adhesive elastomeric interlayer.
Claim 15
Dependent Claim
8 words
intermediate said layers, a transparent adhesive elastomeric interlayer.
Claim 16
Dependent Claim
20 words
The structure of claim 2, wherein the epoxy resin is a methylolated derivative of a diglycidyl polyether of bisphenol A.
Claim 17
Dependent Claim
8 words
INTERMEDIATE SAID LAYERS, A TRANSPARENT ADHESIVE ELASTOMERIC INTERLAYER,
Claim 18
Dependent Claim
8 words
INTERMEDIATE SAID LAYERS, A TRANSPARENT ADHESIVE ELASTOMERIC INTERLAYER,
Claim 19
Dependent Claim
14 words
The structure of claim 1, wherein the aromatic polycarbonate is a polybisphenol A carbonate.
Claim 20
Dependent Claim
14 words
The structure of claim 1, wherein the aromatic polycarbonate is a polyphenolphthalein carbonate resin.
Claim 21
Dependent Claim
17 words
The structure of claim 5, wherein the molecular weight of the polycarbonate ranges from 30,000 to 100,000.
Claim 22
Dependent Claim
10 words
The structure of claim 1, wherein the catalyst is trimethoxyboroxine.
Claim 23
Dependent Claim
19 words
THE STRUCTURE OF CLAIM 1, WHEREIN THE LAMINATE STRUCTURE IS COATED WITH A THIN TRANSPARENT POLYMERIC ABRASION RESISTANT MATERIAL.
Claim 24
Dependent Claim
9 words
A transparent heat-, fire- and impact-resistant laminate structurE comprising:
Claim 25
Dependent Claim
9 words
A transparent heat-, fire- and impact-resistant laminate structurE comprising:
Claim 26
Dependent Claim
18 words
The structure of claim 8 wherein the polymeric abrasion resistant material consists of a hard transparent silicone polymer.
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |