Patent US2846971A successfully refreshed from Google Patents.
US2846971A
Expired / Lapsed
US
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Apparatus for coating particulate material by thermal evaporation
Assignee: National Research Corp
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Filing: 1956-02-23
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Granted: 1958-08-12
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Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 Charles A Baer
- 👤 Robert W Steeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1695362A
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US2161950A
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US2398517A
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US2378476A
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US2702523A
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US2601355A
Cited
US2658847A
Cited
US2639269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |