US3914516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sun protection glass
Assignee: Balzers Patent und Beteiligungs AG
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Filing: 1973-10-19
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Granted: 1975-10-21
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Expires: 1993-10-19
Abstract
Abstract A sun protection glass comprises an absorption free base glass having a light absorbing thin vacuum vapor deposited layer comprising a mixture of a non-metallic embedding material of low absorption with a metal as an absorption substance and composed of a mixture of magnesium fluoride, chromium and silver. The layer advantageously contains from 350 to 500 parts by weight of magnesium fluoride and 75 to 100 parts by weight of chromium and 10 to 50 parts by weight of silver. The light absorbing layer may be coated with antiflection layer.
Inventors
- 👤 Elmar Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/006; C03C17/008; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C03C2217/00; C03C2217/20; C03C2217/28; C03C2217/284; C03C2217/285; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A SUN PROTECTION GLASS COMPRISING AN ABSORPTION-FREE BASE GLASS, AND A LIGHT ABSORBING THIN VACUUM VAPOR DEPOSITED LAYER OF A MIXTURE OF NON-METALLIC EMBEDDING MATERIAL OF LOW ABSORPTION WITH METAL AS ABSORPTION SUBSTANCES COMPOSED OF A MIXTURE OF MAGNESIUM FLUORIDE, CHROMIUM AND SILVER, SAID LAYER CONTAINING 350 TO 500 PARTS BY WEIGHT MAGNESIUM FLUORIDE, 75 TO 100 PARTS BY WEIGHT CHROMIUM AND 10 TO 50 PARTS BY WEIGHT SILVER.
Claim 2
Dependent Claim
69 words
A SUN PROTECTION GLASS COMPRISING AN ABSORPTION-FREE BASE GLASS, AND A LIGHT ABSORBING THIN VACUUM VAPOR DEPOSITED LAYER OF A MIXTURE OF NON-METALLIC EMBEDDING MATERIAL OF LOW ABSORPTION WITH METAL AS ABSORPTION SUBSTANCES COMPOSED OF A MIXTURE OF MAGNESIUM FLUORIDE, CHROMIUM AND SILVER, SAID LAYER CONTAINING 350 TO 500 PARTS BY WEIGHT MAGNESIUM FLUORIDE, 75 TO 100 PARTS BY WEIGHT CHROMIUM AND 10 TO 50 PARTS BY WEIGHT SILVER.
Claim 3
Dependent Claim
23 words
A sun protection glass according to claim 1, wherein said layer contains 80 parts by weight chromium and 20 parts by weight silver.
Claim 4
Dependent Claim
23 words
A sun protection glass according to claim 1, wherein said layer contains 80 parts by weight chromium and 40 parts by weight silver.
Claim 5
Dependent Claim
20 words
A sun protection glass according to claim 1, wherein said sun protection glass has an absorption of at least 60%.
References Cited (Backward Citations)
US3010850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |