Patent US2409689A successfully refreshed from Google Patents.
Patent US2613587A successfully refreshed from Google Patents.
US2613587A
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Assignee: JET HEET Inc
•
Filing: 1948-05-01
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Granted: 1952-10-14
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Maccracken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:00
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/26; F24F1/00; F24F1/01; F24F2221/00; F24F2221/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB379430A
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US1140873A
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US2119127A
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US1090934A
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US1913980A
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US2000597A
Cited
US2122168A
Cited
US2131512A
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US2162923A
Cited
GB530178A
Cited
US2314569A
Cited
US2345537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |