Patent US2979896A successfully refreshed from Google Patents.
US2979896A
Expired / Lapsed
US
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Power unit
Assignee: Olin Corp
•
Filing: 1958-02-04
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Granted: 1961-04-18
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold E Perkins
- 👤 Donald W Haskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:35
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/04; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/36; F02K9/95; F02N; F02N13/00; F02N13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733568A
Cited
GB190726430A
Cited
US2529465A
Cited
GB642684A
Cited
US2713768A
Cited
US2776623A
Cited
GB742120A
Cited
US2816418A
Cited
US2937493A
Cited
US2920564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |