Patent US4223974A successfully refreshed from Google Patents.
US4223974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced bonding of silicon oxides and silver by intermediate coating of metal
Assignee: Cabot Safety Intermediate LLC
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Filing: 1978-08-02
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Granted: 1980-09-23
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Expires: 1998-08-02
Abstract
Abstract Interference filters having a vapor deposited layer of a silicon oxide adjacent to a vapor deposited layer of silver have adhesion between these layers improved by a very thin intermediate coating of chromium, nickel or an alloy containing about 90% chromium and nickel. Plastic articles having infrared reflecting interference filters with improved adhesion between layers, such as lenses and welding faceplates, are also disclosed.
Inventors
- 👤 Jon D. Masso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:25
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/281; G02B5/282
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
In an interference filter having a silver layer and a SiO x layer, where x has a value of 1 to 2 and the layers have been vapor deposited, the improvement comprising a, vapor-deposited, adhesion promoting metal layer selected from the group consisting of Ni, Cr and Inconel, intermediate said silver layer and said SiO x layer.
Claim 2
Dependent Claim
57 words
In an interference filter having a silver layer and a SiO x layer, where x has a value of 1 to 2 and the layers have been vapor deposited, the improvement comprising a, vapor-deposited, adhesion promoting metal layer selected from the group consisting of Ni, Cr and Inconel, intermediate said silver layer and said SiO x layer.
Claim 3
Dependent Claim
19 words
The improvement of claim 1 wherein the adhesion-promoting metal layer has a thickness of about 3 to 20 A.
Claim 4
Dependent Claim
20 words
The improvement of claim 2 wherein the adhesion-promoting layer is Cr and the thickness is about 4 to 6 A.
Claim 5
Dependent Claim
11 words
The improvement of claim 1 wherein the adhesion-promoting layer is Cr.
Claim 6
Dependent Claim
73 words
An infrared reflecting welding faceplate comprising: (A) a polycarbonate plastic substrate; (B) an interference filter bonded to a side of A having sequentially (1) a layer of SiO x , where 1>x>2, (2) an adhesion-promoting layer of Cr, Ni or Inconel, (3) a layer of Ag, (4) an adhesion-promoting layer of Cr, Ni or Inconel, (5) a layer of SiO x , where 1>x>2, and; (c) a continuous abrasion-resistant coating enclosing the faceplate.
Claim 7
Dependent Claim
73 words
An infrared reflecting welding faceplate comprising: (A) a polycarbonate plastic substrate; (B) an interference filter bonded to a side of A having sequentially (1) a layer of SiO x , where 1>x>2, (2) an adhesion-promoting layer of Cr, Ni or Inconel, (3) a layer of Ag, (4) an adhesion-promoting layer of Cr, Ni or Inconel, (5) a layer of SiO x , where 1>x>2, and; (c) a continuous abrasion-resistant coating enclosing the faceplate.
Claim 8
Dependent Claim
20 words
The infrared-reflecting welding faceplate of claim 5 wherein (B)(2) and (B)(4) are Cr and about 4 to 6 A thick.
Claim 9
Dependent Claim
71 words
An infrared-reflecting lens comprising: (A) a polycarbonate lens substrate; (B) an interference filter bonded to a side of A having sequentially (1) a layer of SiO x , where 1>x>2, (2) an adhesion-promoting layer of Cr, Ni or Inconel, (3) a layer of Ag, (4) an adhesion-promoting layer of Cr, Ni or Inconel, (5) a layer of SiO x , where 1>x>2, and; (c) a continuous abrasion-resistant coating on the lens.
Claim 10
Dependent Claim
71 words
An infrared-reflecting lens comprising: (A) a polycarbonate lens substrate; (B) an interference filter bonded to a side of A having sequentially (1) a layer of SiO x , where 1>x>2, (2) an adhesion-promoting layer of Cr, Ni or Inconel, (3) a layer of Ag, (4) an adhesion-promoting layer of Cr, Ni or Inconel, (5) a layer of SiO x , where 1>x>2, and; (c) a continuous abrasion-resistant coating on the lens.
Claim 11
Dependent Claim
18 words
The lens of claim 7 wherein (B)(2) and (B)(4) are Cr and about 4 to 6 A thick.
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |