US2456899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of silicon compounds in producing quartz coatings in a vacuum
Assignee: Libbey Owens Ford Glass Co
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Filing: 1947-11-03
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Granted: 1948-12-21
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Expires: 1967-11-03
Abstract
No abstract record available.
Inventors
- 👤 Strong John Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:35
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/58; C23C14/5846; C23C14/5853; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C23C14/06; C23C14/10; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151; C03C2218/30; C03C2218/32; C03C2218/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2386876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |