Patent US2710907A successfully refreshed from Google Patents.
US2710907A
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US
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Energy transfer unit
Assignee: Sun Electric Corp
•
Filing: 1953-01-02
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Granted: 1955-06-14
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Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Vernon C Westberg
- 👤 James H Nilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:30
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US783057A
Cited
US1864334A
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US1908559A
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US1951675A
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US1942758A
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US2217296A
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US2456781A
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US2491399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |