US3414038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat recovery method and apparatus
Assignee: Metso Fiber Karlstad AB
•
Filing: 1965-06-21
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Granted: 1968-12-03
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 Laakso Oliver Armas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/10; B; B01; B01D; B01D3/00; B01D3/06; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S159/00; Y10S159/22
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |