US2440135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for depositing substances by thermal evaporation in vacuum chambers
Assignee: Individual
•
Filing: 1944-09-15
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Granted: 1948-04-20
•
Expires: 1964-09-15
Abstract
No abstract record available.
Inventors
- 👤 Alexander Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:32
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; C03; C03C; C03C17/00; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/51; H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; H01J41/00; H01J41/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1256599A
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US2074281A
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US2100045A
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GB485965A
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US2273941A
Cited
US2242101A
Cited
GB551757A
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 |