US2183302A
Expired / Lapsed
US
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Method for producing coatings of high ohmic resistance in the interior of vacuum tubes
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1937-01-06
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Granted: 1939-12-12
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Expires: 1957-01-06
Abstract
No abstract record available.
Inventors
- 👤 Brauer Richard
- 👤 Brauer Magdalene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:10
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06; C; C23; C23C; C23C16/00; C23C16/56; C23C18/00; C23C18/02; C23C18/08; H01B; H01B1/00; H01J29/00; H01J29/86; H01J29/88; H01J9/00; H01J9/20; H01J2229/00; H01J2229/88; H01J2229/882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-12-11 | 1943-06-12 | 1943-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-11 | 1947-06-12 | 1947-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-11 | 1951-06-12 | 1951-12-12 | $7700.00 | Window Closed / Lapsed |