US3679790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of finishing boards of vegetable material
Assignee: Individual
•
Filing: 1970-06-12
•
Granted: 1972-07-25
•
Expires: 1990-06-12
Abstract
Abstract A method and an apparatus for finishing boards of vegetable material including the production of a sliding movement over at least one surface of the board. Specific apparatus elements are provided to effect the sliding movement including rotative and non-rotative structures. The method includes high temperature and high pressure treatment in combination with the production of a sliding movement on at least one surface of the board. The board may be treated after drying and upon both sides thereof simultaneously.
Inventors
- 👤 Alf Adolf Alfsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:58
CPC Classifications
B; B27; B27N; B27N7/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A method as defined in claim 1 wherein the sliding movement is provided after the board is in a dried condition.
Claim 2
Dependent Claim
40 words
A method as defined in claim 1 wherein said sliding movement is produced by passing the advancing board between at least one pair of rollers that are rotating at a relative speed less than the advancing speed of the board.
Claim 3
Dependent Claim
23 words
A method as defined in claim 1 wherein the sliding movement is provided on both sides of the board within the treating zone.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |