US3226249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing light diffusing coatings on quartz and quartz objects provided with such coatings
Assignee: US Philips Corp
•
Filing: 1961-09-11
•
Granted: 1965-12-28
•
Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Henricus Antonius Van Bakel
- 👤 Spreuwenb Paul Berna Hubertina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/212; C03C2217/214; C03C2217/229; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF PROVIDING AN ADHERENT LIGHT-DIFFUSING COATING ON A TRANSPARENT QUARTZ SUBSTRATE COMPRISING THE STEPS, APPLYING TO THE SUBSTRATE A COATING MATERIAL CONSISTING OF ABOUT 15 TO 95% BY WEIGHT OF TIO2 AND THE BALANCE AL2O3, AND SINTERING THE THUS APPLIED COATING AT A TEMPERATURE OF ABOUT 1000* TO 1500*C. FOR A SUFFICIENT TIME TO FORM AN ADHERENT LAYER OF SAID COATING MATERIAL ON SAID SUBSTRATE.
Claim 2
Independent Claim
67 words
A METHOD OF PROVIDING AN ADHERENT LIGHT-DIFFUSING COATING ON A TRANSPARENT QUARTZ SUBSTRATE COMPRISING THE STEPS, APPLYING TO THE SUBSTRATE A COATING MATERIAL CONSISTING OF ABOUT 15 TO 95% BY WEIGHT OF TIO2 AND THE BALANCE AL2O3, AND SINTERING THE THUS APPLIED COATING AT A TEMPERATURE OF ABOUT 1000* TO 1500*C. FOR A SUFFICIENT TIME TO FORM AN ADHERENT LAYER OF SAID COATING MATERIAL ON SAID SUBSTRATE.
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |