US2430423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal grinding machine
Assignee: ANNA E HEIM
•
Filing: 1945-01-08
•
Granted: 1947-11-04
•
Expires: 1965-01-08
Abstract
No abstract record available.
Inventors
- 👤 Lewis R Heim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:11
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229526A
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US1491922A
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US1765787A
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US1840841A
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US1817953A
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US1877572A
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US1976366A
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US2237583A
Cited
US2353379A
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US2359901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-03 | 1951-05-05 | 1951-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-03 | 1955-05-05 | 1955-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-03 | 1959-05-05 | 1959-11-04 | $7700.00 | Window Closed / Lapsed |