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US2721544A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1950-10-02
•
Granted: 1955-10-25
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Wayne H Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:24
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1651156A
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US1608537A
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US1716715A
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US1948676A
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US1801407A
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US1848188A
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GB379877A
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US2136040A
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US2180663A
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US2401847A
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US2435041A
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US2435101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |