US2649387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming nonreflecting coating on glass
Assignee: Eastman Kodak Co
•
Filing: 1950-10-27
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Granted: 1953-08-18
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Expires: 1970-10-27
Abstract
No abstract record available.
Inventors
- 👤 William F Parsons
- 👤 Juanita N Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:08
CPC Classifications
C; C03; C03C; C03C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF FORMING ON LEAD GLASS A BLACK OPAQUE COATING WHICH IS NON-REFLECTING AT THE INTERFACE BETWEEN THE COATING AND THE GLASS, WHICH COMPRISES PLACING A SILVER COATING ON THE LEAD GLASS, DIFFUSING THE SILVER INTO THE LEAD GLASS BY HEATING THE SILVERED GLASS IN AN ATMOSPHERE OF OXYGEN AT A TEMPERATURE WITHIN THE RANGE OF 850* F. TO 1000* F. FOR AT LEAST 15 HOURS, AND REDUCING THE DIFFUSED SILVERED LEAD GLASS SURFACE IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OF FROM 750* F. TO 900* F. FOR 1 TO 2 HOURS, THE HEATING TEMPERATURES OF THE SILVER DIFFUSING AND THE REDUCING STEPS ALSO BEING BELOW THE SOFTENING POINT OF THE PARTICULAR LEAD GLASS BEING COATED.
Claim 2
Independent Claim
119 words
THE METHOD OF FORMING ON LEAD GLASS A BLACK OPAQUE COATING WHICH IS NON-REFLECTING AT THE INTERFACE BETWEEN THE COATING AND THE GLASS, WHICH COMPRISES PLACING A SILVER COATING ON THE LEAD GLASS, DIFFUSING THE SILVER INTO THE LEAD GLASS BY HEATING THE SILVERED GLASS IN AN ATMOSPHERE OF OXYGEN AT A TEMPERATURE WITHIN THE RANGE OF 850* F. TO 1000* F. FOR AT LEAST 15 HOURS, AND REDUCING THE DIFFUSED SILVERED LEAD GLASS SURFACE IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OF FROM 750* F. TO 900* F. FOR 1 TO 2 HOURS, THE HEATING TEMPERATURES OF THE SILVER DIFFUSING AND THE REDUCING STEPS ALSO BEING BELOW THE SOFTENING POINT OF THE PARTICULAR LEAD GLASS BEING COATED.
References Cited (Backward Citations)
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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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |