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US2567387A
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Vacuum mandrel
Assignee: McGraw Electric Co
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Filing: 1947-10-21
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Granted: 1951-09-11
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Expires: 1967-10-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:06
CPC Classifications
B; B65; B65H; B65H19/00; B65H19/22; B65H19/2276; H; H01; H01G; H01G13/00; H01G13/02; B65H2406/00; B65H2406/30; B65H2406/36; B65H2406/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1271132A
Cited
US1706826A
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US1963381A
Cited
US1926536A
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DE638353C
Cited
US2415075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |