US4812359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact-resistant laminate
Assignee: Pilkington Group Ltd
•
Filing: 1986-05-23
•
Granted: 1989-03-14
•
Expires: 2006-05-23
Abstract
Abstract An impact-resistant laminate has a front glass sheet which receives an impact such as a bullet, and a rear polycarbonate sheet. A thin polycarbonate sheet up to about 1 mm thick is adhered to the rear polycarbonate sheet, and carries a self-healing polyurethane coating.
Inventors
- 👤 Christopher W. G. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B27/00; B32B27/36; B32B27/365; B32B17/10064; B32B17/10165; B32B17/1033; B32B17/1055; B32B17/1077; B32B27/06; B32B27/08; B32B27/40; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0407; B32B2307/00; B32B2307/50; B32B2307/554; B32B2369/00; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31627; Y10T428/3163; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31859; Y10T428/31862; Y10T428/31942
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
44 words
An impact-resistant laminate comprising a front glass sheet which receives an impact and a rear polycarbonate sheet to the rear face of which there is adhered a thin polycarbonate sheet not more than about 0.64 mm thick having an abrasion-resistant self-healing coating of polyurethane.
Claim 2
Dependent Claim
44 words
An impact-resistant laminate comprising a front glass sheet which receives an impact and a rear polycarbonate sheet to the rear face of which there is adhered a thin polycarbonate sheet not more than about 0.64 mm thick having an abrasion-resistant self-healing coating of polyurethane.
Claim 3
Dependent Claim
52 words
An impact-resistant laminate comprising a front glass sheet which receives an impact and a rear polycarbonate sheet to the rear face of which there is adhered a thin polycarbonate sheet of thickness in the range about 0.25 mm to about 0.64 mm, which thin polycarbonate sheet has a self-healing coating of polyurethane.
Claim 4
Dependent Claim
52 words
An impact-resistant laminate comprising a front glass sheet which receives an impact and a rear polycarbonate sheet to the rear face of which there is adhered a thin polycarbonate sheet of thickness in the range about 0.25 mm to about 0.64 mm, which thin polycarbonate sheet has a self-healing coating of polyurethane.
Claim 5
Dependent Claim
27 words
A laminate according to claim 1 or claim 2, wherein the thin polycarbonate sheet is adhered to the rear polycarbonate sheet by means of a thermoplastic polyurethane.
Claim 6
Dependent Claim
71 words
An impact-resistant laminate comprising at least two sheets of annealed glass bonded together by a polyvinylbutyral interlayer, the front glass sheet of which receives an impact, a rear polycarbonate sheet bonded to the rear glass face of said sheets of annealed glass, and a thin polycarbonate sheet not more than about 0.64 mm thick adhered to the rear polycarbonate sheet, which thin polycarbonate sheet has an abrasion-resistant self-healing coating of polyurethane.
Claim 7
Dependent Claim
71 words
An impact-resistant laminate comprising at least two sheets of annealed glass bonded together by a polyvinylbutyral interlayer, the front glass sheet of which receives an impact, a rear polycarbonate sheet bonded to the rear glass face of said sheets of annealed glass, and a thin polycarbonate sheet not more than about 0.64 mm thick adhered to the rear polycarbonate sheet, which thin polycarbonate sheet has an abrasion-resistant self-healing coating of polyurethane.
Claim 8
Dependent Claim
25 words
A laminate according to claim 4, wherein the thickness of the thin polycarbonate sheet is in the range about 0.25 mm to about 0.64 mm.
Claim 9
Dependent Claim
27 words
A laminate according to claim 4 or claim 5, wherein the thin polycarbonate sheet is adhered to the rear polycarbonate sheet by means of a thermoplastic polyurethane.
Claim 10
Dependent Claim
59 words
An impact-resistant laminate comprising a front sheet of toughened glass which receives an impact and at least one sheet of polycarbonate, thermoplastic interlayers bonding those sheets, a thin polycarbonate sheet not more than about 0.64 mm thick adhered to the rear face of the rear polycarbonate sheet, and an abrasion-resistant self-healing coating of polyurethane on the thin polycarbonate sheet.
Claim 11
Dependent Claim
59 words
An impact-resistant laminate comprising a front sheet of toughened glass which receives an impact and at least one sheet of polycarbonate, thermoplastic interlayers bonding those sheets, a thin polycarbonate sheet not more than about 0.64 mm thick adhered to the rear face of the rear polycarbonate sheet, and an abrasion-resistant self-healing coating of polyurethane on the thin polycarbonate sheet.
Claim 12
Dependent Claim
26 words
A laminate as claimed in claim 7, wherein the thickness of the thin polycarbonate sheet is in the range about 0.25 mm to about 0.64 mm.
Claim 13
Dependent Claim
27 words
A laminate according to claim 7 or claim 8, wherein the thin polycarbonate sheet is adhered to the rear polycarbonate sheet by means of a thermoplastic polyurethane.
Claim 14
Dependent Claim
80 words
A curved laminated impact resistant panel comprising: a front glass sheet which receives an impact and which is preformed to a predetermined curvature, a rear polycarbonate sheet which is preformed to a curved configuration which matches the configuration of the curved front glass sheet, and a self-healing coating of polyurethane which is carried by a thin flexible polycarbonate sheet which is adhered to the rearmost curved face of said rear polycarbonate sheet without preforming of said thin flexible polycarbonate sheet.
Claim 15
Dependent Claim
80 words
A curved laminated impact resistant panel comprising: a front glass sheet which receives an impact and which is preformed to a predetermined curvature, a rear polycarbonate sheet which is preformed to a curved configuration which matches the configuration of the curved front glass sheet, and a self-healing coating of polyurethane which is carried by a thin flexible polycarbonate sheet which is adhered to the rearmost curved face of said rear polycarbonate sheet without preforming of said thin flexible polycarbonate sheet.
Claim 16
Dependent Claim
75 words
A curved laminated impact resistant panel as claimed in claim 10, further comprising an intermediate glass sheet which is preformed to a configuration matching said front glass sheet and bonded thereto by a polyvinylbutyral interlayer, and wherein said preformed rear polycarbonate sheet is bonded to said intermediate glass sheet by a polyurethane interlayer, and said thin flexible polycarbonate sheet with its outer self-healing coating of polyurethane is a film up to about 1 mm thick.
Claim 17
Dependent Claim
34 words
A curved laminated impact resistant panel as claimed in claim 11, wherein the thickness of said self-healing polyurethane coating is about 0.5 mm, and said thin flexible polycarbonate sheet is about 0.5 mm thick.
Claim 18
Dependent Claim
33 words
A curved laminated impact resistant panel as claimed in claim 10, wherein said thin flexible polycarbonate sheet with its outer self-healing coating of polyurethane is a film up to about 1 mm thick.
Claim 19
Dependent Claim
31 words
A curved laminated impact resistant panel as claimed in claim 13, wherein the thickness of said self-healing polyurethane coating is in the range of about 0.25 mm to about 0.5 mm.
Claim 20
Dependent Claim
86 words
A curved laminated security panel comprising: a front glass sheet which receives an impact and which is preformed to a predetermined curvature, a rear polycarbonate sheet which is preformed to a configuration matching the front glass sheet, and a self-healing polyurethane coating which is carried by a polycarbonate sheet and is adhered to the rearmost curved face of said rear polycarbonate sheet without preforming of said thick polycarbonate sheet, the polycarbonate sheet with its outer self-healing coating of polyurethane being a film about 1 mm thick.
Claim 21
Dependent Claim
86 words
A curved laminated security panel comprising: a front glass sheet which receives an impact and which is preformed to a predetermined curvature, a rear polycarbonate sheet which is preformed to a configuration matching the front glass sheet, and a self-healing polyurethane coating which is carried by a polycarbonate sheet and is adhered to the rearmost curved face of said rear polycarbonate sheet without preforming of said thick polycarbonate sheet, the polycarbonate sheet with its outer self-healing coating of polyurethane being a film about 1 mm thick.
Claim 22
Dependent Claim
25 words
A curved laminated security panel as claimed in claim 15, wherein said self-healing polyurethane coating is from about 0.25 mm to about 0.50 mm thick.
Claim 23
Independent Claim
102 words
A method of producing a curved laminated impact resistant panel wherein a preformed curved glass sheet which is to be the impact-receiving front glass sheet of the panel is laminated with a preformed curved polycarbonate sheet whose curvature matches the curvature of said front glass sheet, which curved polycarbonate sheet is to be the rear sheet of the laminate, comprising applying a self-healing coating of polyurethane to said rear polycarbonate sheet by adhering to the preformed curved rear polycarbonate face of said rear polycarbonate sheet, a thin flexible polycarbonate sheet which carries said self-healing coating, without preforming said thin flexible polycarbonate sheet.
Claim 24
Independent Claim
102 words
A method of producing a curved laminated impact resistant panel wherein a preformed curved glass sheet which is to be the impact-receiving front glass sheet of the panel is laminated with a preformed curved polycarbonate sheet whose curvature matches the curvature of said front glass sheet, which curved polycarbonate sheet is to be the rear sheet of the laminate, comprising applying a self-healing coating of polyurethane to said rear polycarbonate sheet by adhering to the preformed curved rear polycarbonate face of said rear polycarbonate sheet, a thin flexible polycarbonate sheet which carries said self-healing coating, without preforming said thin flexible polycarbonate sheet.
Claim 25
Dependent Claim
29 words
A method as claimed in claim 17, wherein said thin flexible polycarbonate sheet with its outer self-healing coating of polyurethane is a film up to about 1 mm thick.
References Cited (Backward Citations)
GB1394271A
Cited
FR2134255A1
Cited
FR2185040A1
Cited
GB1430987A
Cited
FR2265613A1
Cited
US4081581A
Cited
GB1504198A
Cited
US4328277A
Cited
GB2011836A
Cited
GB2070045A
Cited
EP0130886A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |