Patent US3798146A successfully refreshed from Google Patents.
US3798146A
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Method of making a transparent article having reduced radiation transmittance
Assignee: BOC Group Ltd
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Filing: 1973-06-06
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Granted: 1974-03-19
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Expires: 1993-06-06
Abstract
Abstract A TRANSPARENT ARTICLE HAVING REDUCED RADIATION TRANSMITTANCE WHICH COMPRISES A BODY OF TRANSPARENT GLASSY SILICEOUS MATERIAL HAVING A SMOOTH CONTINUOUS SURFACE, A CONTINUOUS INTERMEDIATE LAYER SPUTTER-COATED ON THE CONTINUOUS SURRFACE TO A THICKNESS OF FROM 10 TO 200 A., THE INTERMEDIATE LAYER BEING OF A METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TITANIUM, CHROMIUM, TUNGSTEN, TANTALUM, AND THEIR ALLOYS, AND A CONTINUOUS FILM SPUTTER-COATED ON THE CONTINUOUS INTERMEDIATE LAYER TO A THICKNESS OF FROM 100 TO 500 A., THE FILM BEING OF A METAL SELECTED FROM THE GROUP CONSISTING OF GOLD, GOLDBASE ALLOYS, COPPER AND COPPER-BASE ALLOYS.
Inventors
- 👤 D Carmichael
- 👤 C Wan
- 👤 D Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |