US4072243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal coated brittle containers, conduits and other objects for laboratory and industry
Assignee: Intertec Associates Inc
•
Filing: 1976-12-23
•
Granted: 1978-02-07
•
Expires: 1996-12-23
Abstract
Abstract Improved metal coated glassware and other brittle, non-metallic engineering materials, including items for laboratory and industry, which items are ordinarily brittle and subject to breakage or rupture under relatively low pressures and relatively minor impacts, utilizing an anti-bonding film, such as graphite, between the external surface of the glass, and a metal coating, which is generally chemically vapor deposited. The coated products have good impact strength, shock resistance, good heat distribution, good pressure capability, and an extremely high safety factor. Brittle fracture or rupture is a fracture unaccompanied by plastic or permanent deformation. Brittleness is that quality or property of a material that leads to crack propagation without plastic deformation.
Inventors
- 👤 Louis A. Conant
- 👤 Wilbur M. Bolton
- 👤 James E. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:52
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3607; B; B01; B01L; B01L3/00; B01L3/50; B65; B65D; B65D23/00; B65D23/08; B65D23/0807; B65D23/0814; B65D23/0835; C03C17/3628; C03C17/3634; C03C17/3649
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
In an armored brittle-ware article selected from the group consisting of laboratory and industrial brittle-ware coated externally with a layer of metal, the improvement which comprises an anti-bonding layer between the natural surface of said brittle-ware and said layer of metal; said anti-bonding layer being selected from the group consisting of thermally stable finely divided particles and thermally stable polymers, and said layer of metal being plated by chemical vapor deposition at an elevated temperature of at least about 150° F over substantially the entire outer surface of said article; the brittle material of said article being under a compressive force at room temperature over the entire inert brittle-ware article, caused by the greater shrinkage of said metal layer than said brittle material when the temperature of said article is lowered from an elevated temperature at which said metal layer was applied to said brittle-ware to room temperature; said coated brittle-ware having shock resistance, substantially increased pressure tolerance and an impact strength of at least about 5 times greater than that of similar uncoated brittle-ware.
Claim 2
Dependent Claim
175 words
In an armored brittle-ware article selected from the group consisting of laboratory and industrial brittle-ware coated externally with a layer of metal, the improvement which comprises an anti-bonding layer between the natural surface of said brittle-ware and said layer of metal; said anti-bonding layer being selected from the group consisting of thermally stable finely divided particles and thermally stable polymers, and said layer of metal being plated by chemical vapor deposition at an elevated temperature of at least about 150° F over substantially the entire outer surface of said article; the brittle material of said article being under a compressive force at room temperature over the entire inert brittle-ware article, caused by the greater shrinkage of said metal layer than said brittle material when the temperature of said article is lowered from an elevated temperature at which said metal layer was applied to said brittle-ware to room temperature; said coated brittle-ware having shock resistance, substantially increased pressure tolerance and an impact strength of at least about 5 times greater than that of similar uncoated brittle-ware.
Claim 3
Dependent Claim
33 words
An armored brittle article as in claim 1, wherein said layer of metal has a thickness of from about 5 mils to about 100 mils and said article is a container or tube.
Claim 4
Dependent Claim
30 words
An armored brittle container or tube as in claim 2, wherein said metal is selected from the group consisting of nickel, copper, aluminum, cobalt, iron, chromium, silver, and mixtures thereof.
Claim 5
Dependent Claim
22 words
An armored brittle container or tube as in claim 3, wherein said layer of metal is a layer of gas plated nickel.
Claim 6
Dependent Claim
42 words
An armored brittle container or tube as in claim 4, wherein said anti-bonding layer has a thickness of from about 1 micron to about 25 microns and is selected from the group consisting of graphite, talc, molybdenum disulfide, polyfluorocarbons, and silicone resins.
Claim 7
Dependent Claim
51 words
An armored brittle container or tube as in claim 5, wherein the brittle material is glass and said layer of metal has a thickness of from about 5 mils to about 100 mils and is selected from the group consisting of nickel, copper, aluminum, iron, silver, cobalt, chromium and mixtures thereof.
Claim 8
Dependent Claim
15 words
An armored glass container or tube as in claim 6, wherein said metal is nickel.
Claim 9
Dependent Claim
26 words
An armored glass container as in claim 7, wherein said layer of metal has at least one screen pattern window etched through said layer of nickel.
Claim 10
Dependent Claim
41 words
An armored glass container as in claim 8, wherein the thickness of said layer of metal is from about 5 mils to about 50 mils, and the thickness of said anti-bonding layer is from about 1 micron to about 10 microns.
Claim 11
Dependent Claim
24 words
An armored glass container as in claim 9, wherein said anti-bonding layer is selected from the group consisting of graphite, molybdenum disulfide and fluorocarbons.
Claim 12
Dependent Claim
15 words
An armored glass container as in claim 10, wherein said anti-bonding layer comprises graphite particles.
Claim 13
Dependent Claim
52 words
An armored brittle container or tube as in claim 6, wherein said brittle material is molded graphite and said layer of metal has a thickness of from about 5 mils to about 100 mils and is selected from the group consisting of nickel, copper, aluminum, iron, cobalt, silver, chromium, and mixtures thereof.
Claim 14
Dependent Claim
14 words
An armored molded graphite article as in claim 12, wherein said metal is nickel.
Claim 15
Dependent Claim
51 words
An armored molded graphite article as in claim 13, wherein said article is in the form of a tube, the thickness of said layer of nickel is from about 5 mils to about 50 mils, and the thickness of said anti-bonding layer is from about 1 micron to about 10 microns.
Claim 16
Dependent Claim
25 words
An armored molded graphite tube as in claim 14, wherein said anti-bonding layer is selected from the group consisting of graphite, molybdenum disulfide and fluorocarbons.
References Cited (Backward Citations)
US242471A
Cited
US514426A
Cited
US2006226A
Cited
US2195436A
Cited
US3403006A
Cited
US3479217A
Cited
US3748174A
Cited
US3888649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |