US2578187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making rotors
Assignee: Individual
•
Filing: 1946-06-25
•
Granted: 1951-12-11
•
Expires: 1966-06-25
Abstract
No abstract record available.
Inventors
- 👤 Hill Myron Francis
- 👤 Francis A Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:41
CPC Classifications
B; B23; B23F; B23F15/00; B23F15/08; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/105883; Y10T409/106042; Y10T409/10636; Y10T409/107473
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US134198A
Cited
USRE21316E
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US1798059A
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US1833993A
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US1997228A
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US2091317A
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US2222515A
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US2474293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |