Patent US2460197A successfully refreshed from Google Patents.
US2460197A
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Vacuum chamber evacuation
Assignee: Chain Belt Co
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Filing: 1945-11-14
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Granted: 1949-01-25
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Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Horace L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:14
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/14; F04F5/16; F04F5/20; F26; F26B; F26B21/00; F26B21/30; F26B21/33; F26B21/331; F26B5/00; F26B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US940648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |