Patent US2575631A successfully refreshed from Google Patents.
US2575631A
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Vacuum mandrel
Assignee: McGraw Electric Co
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Filing: 1950-12-29
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Granted: 1951-11-20
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Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:58
CPC Classifications
B; B65; B65H; B65H19/00; B65H19/22; B65H19/2276; H; H01; H01G; H01G13/00; H01G13/02; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/41419; B65H2301/41426; B65H2301/4144; B65H2301/41445; B65H2301/41446; B65H2406/00; B65H2406/30; B65H2406/36; B65H2406/365
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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |