US2439983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for thermally evaporating various materials in vacuums for coating purposes
Assignee: Libbey Owens Ford Glass Co
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Filing: 1944-01-15
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Granted: 1948-04-20
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Expires: 1964-01-15
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morgan
- 👤 Arthur R Weinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2341827A
Cited
US2074281A
Cited
US2160981A
Cited
US2151457A
Cited
US2273941A
Cited
GB502978A
Cited
US2354521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |