US2442976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating glass with silica
Assignee: Individual
•
Filing: 1942-01-06
•
Granted: 1948-06-08
•
Expires: 1962-01-06
Abstract
No abstract record available.
Inventors
- 👤 Heany John Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:05
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/25; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112; C03C2218/15; C03C2218/152; Y; Y10; Y10S; Y10S425/00; Y10S425/121
Claims Analysis
Total Claims: 0
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GB502978A
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US2220862A
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US2295626A
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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) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |