US4273828A
Expired / Lapsed
US
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Bulk glass having improved properties
Assignee: RCA Corp
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Filing: 1979-08-14
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Granted: 1981-06-16
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Expires: 1999-08-14
Abstract
Abstract Shaped bulk glass is provided which has improved properties and in particular improved compressive strength. The improvement is obtained by plasma depositing a film of amorphous polymeric hydrogenated silicon-silicon nitride on the surface of the bulk glass.
Inventors
- 👤 Chester E. Tracy
- 👤 Werner Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:48
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/34; C23C16/345; C03; C03C; C03C17/00; C03C17/22; C03C17/225; C03C25/00; C03C25/10; C03C25/42; C03C2217/00; C03C2217/20; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152; C03C2218/153; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A shaped bulk glass body having a film on at least a portion of the surface thereof of a plasma deposited amorphous polymeric hydrogenated silicon-silicon nitride of the formula --Si x N y H z -- n , where x, y, z, and n are integers, said film being at least 500 angstroms in thickness and having a compressive strength of at least about 0.7×10 9 dynes/cm 2 and said bulk glass body having a resistance to deformation sufficient to limit the deformation induced by the film on the surface to less than about 5%.
Claim 2
Dependent Claim
95 words
A shaped bulk glass body having a film on at least a portion of the surface thereof of a plasma deposited amorphous polymeric hydrogenated silicon-silicon nitride of the formula --Si x N y H z -- n , where x, y, z, and n are integers, said film being at least 500 angstroms in thickness and having a compressive strength of at least about 0.7×10 9 dynes/cm 2 and said bulk glass body having a resistance to deformation sufficient to limit the deformation induced by the film on the surface to less than about 5%.
Claim 3
Dependent Claim
35 words
The shaped bulk glass according to claim 1 wherein the said film is comprised of a member selected from the group consisting of an amorphous hydrogenated silicon, amorphous polymeric hydrogenated silicon nitride and mixtures thereof.
Claim 4
Dependent Claim
36 words
The shaped bulk glass according to claim 1 wherein the film is comprised of the plasma reaction product of about one part by volume of silane to up to about 40 parts by volume of ammonia.
Claim 5
Dependent Claim
15 words
The shaped bulk glass according to claim 1 wherein the glass is a flat glass.
Claim 6
Dependent Claim
14 words
The shaped bulk glass according to claim 1 wherein the glass is container glass.
Claim 7
Dependent Claim
13 words
The shaped bulk glass according to claim 1 wherein the glass is fiberglass.
Claim 8
Dependent Claim
20 words
The shaped bulk glass according to claim 1 wherein the glass is in the form of a television picture tube.
References Cited (Backward Citations)
US3549411A
Cited
US4118211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |