Patent US2268296A successfully refreshed from Google Patents.
US2268296A
Expired / Lapsed
US
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Cooling apparatus
Assignee: FLSmidth and Co AS
•
Filing: 1939-03-01
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Granted: 1941-12-30
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Expires: 1959-03-01
Abstract
No abstract record available.
Inventors
- 👤 Narsted John
- 👤 Povl T Lindhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:50
CPC Classifications
F; F27; F27D; F27D15/00; F27D15/02; F27D15/0206; F27D15/028; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/18
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) | 1944-12-29 | 1945-06-30 | 1945-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-29 | 1949-06-30 | 1949-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-29 | 1953-06-30 | 1953-12-30 | $7700.00 | Window Closed / Lapsed |