US2505629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing silica films and preparation of solutions therefor
Assignee: RCA Corp
•
Filing: 1949-06-30
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Granted: 1950-04-25
•
Expires: 1969-06-30
Abstract
No abstract record available.
Inventors
- 👤 Soren M Thomson
- 👤 Frederick H Nicoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:56
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/111; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS OF DEPOSITING A TRANSPARENT, HARD, FILM OF SILICA ON A GLASS SURFACE, COMPRISING IMMERSING A GLASS ARTICLE TO BE COATED IN A SOLUTION OF FLUOSILICIC ACID HAVING A MOLAR CONCENTRATION OF BETWEEN ABOUT 1.25 AND ABOUT 4 AND WHICH IS AT A TEMPERATURE NOT EXCEEDING ABOUT 70*C., SAID
Claim 2
Dependent Claim
50 words
A PROCESS OF DEPOSITING A TRANSPARENT, HARD, FILM OF SILICA ON A GLASS SURFACE, COMPRISING IMMERSING A GLASS ARTICLE TO BE COATED IN A SOLUTION OF FLUOSILICIC ACID HAVING A MOLAR CONCENTRATION OF BETWEEN ABOUT 1.25 AND ABOUT 4 AND WHICH IS AT A TEMPERATURE NOT EXCEEDING ABOUT 70*C., SAID
References Cited (Backward Citations)
US2366516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |