US2841384A
Expired / Lapsed
US
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Method and apparatus for cooling materials by gas
Assignee: FLSmidth and Co AS
•
Filing: 1954-12-23
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Granted: 1958-07-01
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Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Petersen Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:47
CPC Classifications
F; F27; F27D; F27D15/00; F27D15/02; F27D15/0286; F27D17/00; F27D17/20; F27D17/22; F27D17/25; F27D3/00; F27D2003/0034; F27D2003/0071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |