US2467953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of glow discharge in vacuum coating processes
Assignee: Distillation Products Inc
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Filing: 1946-09-19
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Granted: 1949-04-19
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Expires: 1966-09-19
Abstract
No abstract record available.
Inventors
- 👤 Bancroft George Herbert
- 👤 Gerhard R Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:24
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; C; C23; C23C; C23C14/00; C23C14/02; C23C14/021; C23C14/022; C23G; C23G5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |