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US3000346A
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US
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Vacuum coating apparatus
Assignee: National Steel Corp
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Filing: 1958-11-05
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Granted: 1961-09-19
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Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Milo P Hnilicka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
D; D06; D06Q; D06Q1/00; D06Q1/04; C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; D06B; D06B21/00; D06M; D06M11/00; D06M11/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US981498A
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US1893716A
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US2239770A
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US2384500A
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US2656284A
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US2695743A
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US2889674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |