US2908391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning and grading machines
Assignee: CRIPPEN Manufacturing Co
•
Filing: 1955-04-18
•
Granted: 1959-10-13
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Frevert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US69545A
Cited
US465924A
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US766538A
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US852050A
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US1109299A
Cited
US1573166A
Cited
US1632739A
Cited
GB701579A
Cited
GB683724A
Cited
FR1044061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |