US3926508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing a cold light mirror by evaporating zns and sio alternately in an o' 2 'atmosphere
Assignee: US Philips Corp
•
Filing: 1972-12-04
•
Granted: 1975-12-16
•
Expires: 1992-12-04
Abstract
Abstract A method of manufacturing a concave cold light mirror by coating a curved surface of a transparent support with a plurality of 1/4 lambda -layers of alternately ZnS and SiO by means of vapour deposition in an oxygen atmosphere at the pressure at which the vapour jets are dispersed between the surface to be coated by vapour deposition and the vapour sources.
Inventors
- 👤 Jan Willem Harmsen
- 👤 Augustinus Petrus Joz Swinkels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3464; C03C17/347
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
121 words
A METHOD OF MANUFACTURING A CONCAVE COLD LIGHT MIRROR BY COATING A CURVED SURFACE OF A TRANSPARENT SUPPORT WITH A PLURALITY OF 1/4 A-LAYERS OF ALTERNATELY A MATERIAL HAVING A RELA TIVELY HIGH REFRACTIVE INDEX AND A MATERIAL HAVING A RELTAIVELY LOW REFRACTIVE INDEX BY MEANS OF VAPOUR DEPOSITION IN AN ATMOSPHERE HAVING A PRESSURE SUCH THAT THE VAPOUR JET IS DISPERSED IN THE SPACE BETWEEN THE VAPOUR SOURCE AND THE SURFACE TO BE COATED, CHARACTERIZED IN THAT A CURVED SURFACE IS ALTERNATELY PROVIDED WITH LAYERS HAVING A RELATIVELY HIGH REFRACTIVE INDEX AND RELATIVELY LOW REFRACTIVE INDEX BY MEANS OF VAPOUR DEPOSITION WITH ALTERNATE ZNS AND SIO IN AN OXYGEN ATMOSPHERE AT A PRESSURE AT WHICH THE VAPOUR JETS ARE DISPERSED
Claim 2
Independent Claim
121 words
A METHOD OF MANUFACTURING A CONCAVE COLD LIGHT MIRROR BY COATING A CURVED SURFACE OF A TRANSPARENT SUPPORT WITH A PLURALITY OF 1/4 A-LAYERS OF ALTERNATELY A MATERIAL HAVING A RELA TIVELY HIGH REFRACTIVE INDEX AND A MATERIAL HAVING A RELTAIVELY LOW REFRACTIVE INDEX BY MEANS OF VAPOUR DEPOSITION IN AN ATMOSPHERE HAVING A PRESSURE SUCH THAT THE VAPOUR JET IS DISPERSED IN THE SPACE BETWEEN THE VAPOUR SOURCE AND THE SURFACE TO BE COATED, CHARACTERIZED IN THAT A CURVED SURFACE IS ALTERNATELY PROVIDED WITH LAYERS HAVING A RELATIVELY HIGH REFRACTIVE INDEX AND RELATIVELY LOW REFRACTIVE INDEX BY MEANS OF VAPOUR DEPOSITION WITH ALTERNATE ZNS AND SIO IN AN OXYGEN ATMOSPHERE AT A PRESSURE AT WHICH THE VAPOUR JETS ARE DISPERSED
Claim 3
Dependent Claim
13 words
Concave cold light mirrors obtained by the method as claimed in claim 1.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |