Patent US2100355A successfully refreshed from Google Patents.
US2100355A
Expired / Lapsed
US
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Method and apparatus for utilizing molten material in heat treatment of liquids not miscible with the molten material
Assignee: PRAY RES CORP
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Filing: 1934-05-07
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Granted: 1937-11-30
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Expires: 1954-05-07
Abstract
No abstract record available.
Inventors
- 👤 William O Pray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:23
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-11-29 | 1941-05-31 | 1941-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-11-29 | 1945-05-31 | 1945-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-11-29 | 1949-05-31 | 1949-11-30 | $7700.00 | Window Closed / Lapsed |