Patent US2539775A successfully refreshed from Google Patents.
US2539775A
Expired / Lapsed
US
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Quick opening cage mill
Assignee: Combustion Engineering Inc
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Filing: 1947-06-07
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Granted: 1951-01-30
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Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Charles W Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:18
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/22; B02C13/26; B02C13/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US357767A
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US829792A
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US1244352A
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US1279672A
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GB148551A
Cited
US2075506A
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US2149018A
Cited
US2216611A
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US2316982A
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US2360086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |