US3614826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture and recovery of conical and discs sets for woodpulp machines
Assignee: Individual
•
Filing: 1968-01-25
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Granted: 1971-10-26
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Expires: 1988-01-25
Abstract
Abstract IN MAKING COMMINUTOR SETS FOR PULP REFINING MACHINES, STAINLESS STEEL OR CARBON STEEL SHEET MATERIAL IS COMPACTED TO A GIVEN THICKNESS TO INCREASE ITS HARDNESS AND TENSILE STRENGTH. COMMINUTING BLADES ARE MADE FROM THE COMPACTED MATERIAL AND WELDED TO RESPECTIVE SURFACES OF THE COMMINUTOR MEMBERS OF THE SET, EMPLOYING A TECHNIQUE OF RIDGELESSLY WELDING IN A SKIPPING SEQUENCE TO AVOID RAISING THE MATERIAL TEMPERATURE DURING WELDING ABOVE 200*C.
Inventors
- 👤 Milton Pilao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:50
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/22; B; B27; B27L; B27L11/00; B27L11/06; D21B; D21B1/00; D21B1/04; D21B1/12; Y; Y10; Y10S; Y10S29/00; Y10S29/032; Y10S29/048; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49721; Y10T29/4973; Y10T29/49826; Y10T29/4984
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |