US3850679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical vapor deposition of coatings
Assignee: PPG Industries Inc
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Filing: 1972-12-15
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Granted: 1974-11-26
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Expires: 1992-12-15
Abstract
Abstract A metal oxide coating is applied to a hot glass surface by contacting the surface with a mixture of carrier air, vaporized solvent and a vaporized metal containing reactant. The mixture is directed against the glass through a nozzle at a Reynolds number exceeding 2500 with the nozzle-to-glass spacing at least 1.25 times the characteristic dimension of the nozzle.
Inventors
- 👤 J Sopko
- 👤 K Simhan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:27
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/54; C23C16/545; C03; C03C; C03C17/00; C03C17/001; C03C17/002; C03C17/22; C03C17/23; C03C17/245; C23C16/453; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/217; C03C2217/219; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
66 words
A METHOD OF APPLYING A COATING TO A SUBSTANCE BY DIRECTING A GASEOUS MIXTURE COMPRISING AT LEAST ONE COATING REACTANT THROUGH A NOZZLE AGAINST A SUBSTRATE COMPRISING: A. VAPORIZING THE COATING REACTANT AND MIXING COATING REACTANT VAPORS AND A CARRIER GAS TO FORM SAID GASEOUS MIXTURE; AND B. DIRECTING SAID GASEOUS MIXTURE THROUGH SAID NOZZLE AT A NOZZLE EXIT REYNOLDS NUMBER OF AT LEAST ABOUT 2500.
Claim 2
Independent Claim
66 words
A METHOD OF APPLYING A COATING TO A SUBSTANCE BY DIRECTING A GASEOUS MIXTURE COMPRISING AT LEAST ONE COATING REACTANT THROUGH A NOZZLE AGAINST A SUBSTRATE COMPRISING: A. VAPORIZING THE COATING REACTANT AND MIXING COATING REACTANT VAPORS AND A CARRIER GAS TO FORM SAID GASEOUS MIXTURE; AND B. DIRECTING SAID GASEOUS MIXTURE THROUGH SAID NOZZLE AT A NOZZLE EXIT REYNOLDS NUMBER OF AT LEAST ABOUT 2500.
Claim 3
Dependent Claim
44 words
The method of applying a coating according to claim 1 wherein said gaseous mixture comprises: a. vapors of a reactive metal compound, and b. a carrier gas comprising at least one reactant which will react with said metal compound under conditions adjacent said substrate.
Claim 4
Dependent Claim
47 words
The method of applying a coating according to claim 1 wherein said gaseous mixture directed from said nozzle wets substantially all of the interior faces of said nozzle while maintaining the surfaces of said nozzle in facing relation to said substrate substantially nonwetted by said gaseous mixture.
Claim 5
Dependent Claim
30 words
The method of applying a coating according to claim 1 wherein said gaseous mixture is directed through said nozzle at a nozzle exit Reynolds number of at least about 5000.
Claim 6
Dependent Claim
40 words
The method of applying a coating according to claim 1 wherein said gaseous mixture flowing through said nozzle has a substantially greater linear velocity at the exit of said nozzle facing said substratE than at the entrance of said nozzle.
Claim 7
Dependent Claim
56 words
The method of applying a coating according to claim 1 wherein said nozzle has an elongated shaped exit end having a major dimension and a minor dimension and wherein said gaseous mixture flows from said nozzle exit a distance of at least 0.5 times the minor dimension of said nozzle exit before impinging against the substrate.
Claim 8
Dependent Claim
41 words
The method of applying a coating according to claim 6 wherein said gaseous mixture flows from said nozzle exit a distance of from about 1.25 to about 5 times the minor dimension of said nozzle exit before impinging against said substrate.
Claim 9
Dependent Claim
30 words
The method of applying a coating according to claim 6 wherein said gaseous mixture is directed through said nozzle at a nozzle exit Reynolds number of at least about 5000.
Claim 10
Dependent Claim
59 words
The method of applying a coating according to claim 1 wherein the temperature of said gaseous mixture at said nozzle exit exceeds that temperature at which said metal reactant saturates said gaseous mixture and the temperature of said gaseous mixture at the nozzle exit is less than that at which said metal reactant will react to form a coating.
Claim 11
Dependent Claim
27 words
The method according to claim 1 wherein the substrate is a ribbon of glass moving at a velocity of about greater than about 100 inches per minute.
Claim 12
Dependent Claim
58 words
The method as set forth in claim 1 wherein the substrate is a ribbon of glass moving in a downstream direction from exit end of a bath chamber of a float tank into an annealing lehr and wherein said directing step is performed upstream of the annealing lehr and downstream of the exit end of the bath chamber.
Claim 13
Dependent Claim
62 words
The method as set forth in claim 11 wherein said nozzle has an elongated shaped exit end having a major dimension and a minor dimension and wherein the gaseous mixture flows from the nozzle exit a distance of about 0.5 to about 10 times the minor dimension of the nozzle exit before impinging on the glass ribbon to coat the glass ribbon.
Claim 14
Dependent Claim
61 words
The method according to claim 1 wherein said directing step further comprises: moving the gaseous mixture through a nozzle having (1) an entrance and an exit end, and (2) having interior surfaces of monotonically and constantly increasing radii of curvature from the entrance end to the exit end to accelerate flow of the gaseous mixture adjacent interior surfaces of the nozzle.
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |