US2620775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating machine
Assignee: Individual
•
Filing: 1946-02-01
•
Granted: 1952-12-09
•
Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Roy J Champayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:14
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/04; B24B23/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1436939A
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US1493650A
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US1495333A
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US1747396A
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GB208765A
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FR609836A
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US1711811A
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US1887620A
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US2050960A
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US2224140A
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US2328918A
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US2400374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |