US2522704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus to treat material in form of pieces or powder with gases
Assignee: Individual
•
Filing: 1943-04-05
•
Granted: 1950-09-19
•
Expires: 1963-04-05
Abstract
No abstract record available.
Inventors
- 👤 Laval Jacques Hjaimar De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:40
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/02; C; C10; C10F; C10F5/00; F; F26; F26B; F26B17/00; F26B17/10; F26B17/101; F26B17/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790162A
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US940076A
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US1840857A
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DE548665C
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GB391388A
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US2054441A
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GB395912A
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US2118078A
Cited
US2077346A
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US2156924A
Cited
GB499428A
Cited
US2313956A
Cited
US2351091A
Cited
US2316207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |