Patent US2426764A successfully refreshed from Google Patents.
US2426764A
Expired / Lapsed
US
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Machine for finishing irregularly shaped articles
Assignee: RTX Corp
•
Filing: 1943-10-26
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Granted: 1947-09-02
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Expires: 1963-10-26
Abstract
No abstract record available.
Inventors
- 👤 Sigmund A Czarnecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:58
CPC Classifications
B; B24; B24B; B24B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US554758A
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US645717A
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US869688A
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US891251A
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GB264625A
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US1691898A
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US1841411A
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US2072951A
Cited
DE682369C
Cited
US2136491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |