Patent US2921300A successfully refreshed from Google Patents.
US2921300A
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Assignee: Cummins Chicago Corp
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Filing: 1954-11-08
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Granted: 1960-01-12
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Zipf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
G; G06; G06V; G06V30/00; G06V30/10; G06V30/22; G06V30/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2124906A
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US2266779A
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US2285296A
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US2302081A
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US2382251A
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US2518694A
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US2759045A
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US2682043A
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US2723308A
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US2794977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |