US3734991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cutting plastic material
Assignee: Calsilox SA
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Filing: 1970-06-22
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Granted: 1973-05-22
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Expires: 1990-06-22
Abstract
Abstract THE INVENTION RELATES TO A METHOD OF CUTTING A BLOCK OF MATERIAL IN A PLASTIC STATE, MORE PARTICULARLY LIGHT WEIGHT CONCRETE, THE BLOCK BEING CUT BY A NUMBER OF CUTTING WIRES EACH TENSIONED BETWEEN A CLAMPING MEMBER RETAINED ABOVE THE BLOCK AND A CLAMPING MEMBER RETAINED THEREBELOW. A METHOD IS PROVIDED IN WHICH THE BLOCK CAN BE CUT ALONG ANY SELECTED PLANES PARALLEL WITH A CUTTING DIRECTION, AND IN WHICH THE EQUIRED CONVEYING MEANS CAN BE VERY SIMPLE. TO THIS END THE BLOCK IS CUT WHILE BEING CARRIED BY CARRYING MEANS ENGAGING OPPOSITE SIDES OF THE BLOCK.
Inventors
- 👤 B Vrijma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:57
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/14; B28B11/145; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/217
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |