US2800307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling temperature change of blends of fluids or fluids and finely divided solids
Assignee: Stratford Engineering Corp
•
Filing: 1954-06-04
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Granted: 1957-07-23
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 David H Putney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:57
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; F28D7/1646; F28D7/06; F28D7/10; F28D7/12; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; Y; Y10; Y10S; Y10S159/00; Y10S159/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1397282A
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US1770320A
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US1877322A
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US1928085A
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US2443817A
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US2507105A
Cited
US2577856A
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US2596975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |