Patent US2428868A successfully refreshed from Google Patents.
US2428868A
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Apparatus for producing hardened optical coatings by electron bombardment
Assignee: RCA Corp
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Filing: 1944-05-01
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Granted: 1947-10-14
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Glenn L Dimmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0694; C03; C03C; C03C3/00; C03C3/12; C23C14/02; C23C14/021; C23C14/022; C23C14/22; C23C14/24; C23C14/58; C23C14/5806; C23C14/582; H; H01; H01J; H01J37/00; H01J37/02; H01J37/24; H01J37/241; H01J37/30; H01J37/305; H01J37/3053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2067907A
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US2103623A
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US2157478A
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US2178233A
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US2164595A
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US2263008A
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US2351536A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |