US4382811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing protective coatings on metal parts to be used in contact with molten glass
Assignee: ECG Immobilier SA
•
Filing: 1981-03-25
•
Granted: 1983-05-10
•
Expires: 2001-03-25
Abstract
Abstract Method of producing protective coatings on metal parts to be used in contact with molten glass. The method of the invention comprises spraying onto the surface to be coated, by a thermal spraying process such as flame or plasma spraying, a powdered material consisting essentially of at least 60% by weight of chromium oxide, from 0 to 40% by weight of a nickel-base alloy such as a nickel-chromium alloy and from 0 to 20% by weight of metal oxides such as aluminum, titanium and zirconium oxides.
Inventors
- 👤 Paul Luscher
- 👤 Hans-Theo Steine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:35
CPC Classifications
C; C03; C03B; C03B9/00; C03B9/30; C03B9/48; C03B40/00; C23; C23C; C23C4/00; C23C4/04; C23C4/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A method of producing a protective coating on metal parts to be used in contact with molten glass, which comprises thermally spraying onto the surface to be coated a powdered material consisting essentially of at least about 60% by weight of sub-stoichiometric chromium sesquioxide, and optionally from 0 to about 40% by weight of a nickel-base alloy and from 0 to about 20% by weight of at least one metal oxide, said optional material when present making up substantially the balance.
Claim 2
Independent Claim
81 words
A method of producing a protective coating on metal parts to be used in contact with molten glass, which comprises thermally spraying onto the surface to be coated a powdered material consisting essentially of at least about 60% by weight of sub-stoichiometric chromium sesquioxide, and optionally from 0 to about 40% by weight of a nickel-base alloy and from 0 to about 20% by weight of at least one metal oxide, said optional material when present making up substantially the balance.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein said nickel-base alloy is a nickel-chromium alloy containing up to about 50% by weight of chromium.
Claim 4
Dependent Claim
25 words
The method of claim 1, wherein said at least one metal oxide is selected from the group consisting of oxides of aluminum, titanium, and zirconium.
Claim 5
Dependent Claim
88 words
A glass-making machine part having a surface coating thereon, said part being employed as an element in the glass-making industry, wherein said coated surface is used in contact with molten glass, said coating being formed of a thermally bonded layer consisting essentially of at least about 60% by weight of sub-stoichiometric chromium sesquioxide, and optionally 0 to about 40% by weight of a nickel-base alloy and 0 to about 20% by weight of at least one metal oxide, said optional material when present making up substantially the balance.
Claim 6
Dependent Claim
88 words
A glass-making machine part having a surface coating thereon, said part being employed as an element in the glass-making industry, wherein said coated surface is used in contact with molten glass, said coating being formed of a thermally bonded layer consisting essentially of at least about 60% by weight of sub-stoichiometric chromium sesquioxide, and optionally 0 to about 40% by weight of a nickel-base alloy and 0 to about 20% by weight of at least one metal oxide, said optional material when present making up substantially the balance.
Claim 7
Dependent Claim
24 words
The glass-making machine part of claim 4, wherein said nickel-base alloy is a nickel-chromium alloy containing up to about 50% by weight of chromium.
Claim 8
Dependent Claim
23 words
The glass-making machine part of claim 4, wherein said at least one metal oxide is selected from oxides of aluminum, titanium, and zirconium.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |