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Forest Science Database

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Abstract

A compilation of 88 patents from Canada and USA covering equipment for tree felling, land clearing, cultivation, seeding, planting and plant care. Copies are also included of the pages of the classification manuals of the US and Canadian patent offices for the classes applicable to silviculture.

Author(s)
Richenhaller, J.; Johnson, S. E.
Citation
Report, Great Lakes Forest Research Centre, Canada, 1981, No. O-X-328, pp [viii] + 162 pp.
Abstract

Patents were evaluated as a measure of technical progress and research activity within wood-based industries. Firms were grouped as (1) those diversified outside the wood-based industry, (2) those diversified between paper products and solid wood products and (3) those serving paper and allied...

Author(s)
Margl, R. A.; Ellefson, P. V.
Citation
Staff Paper, Department of Forest Resources, University of Minnesota, 1985, No. 50, pp iii + 65 pp.
Abstract

Citation
International Standard, 1985, No. ISO 8380: 1985, pp 2 pp
Abstract

Author(s)
Johnson, S. E.; Richenhaller, J.
Citation
Information Report, Forest Management Institute, Canada, 1978, No. FMR-X-21C (4th ed.), pp 144 pp.
Abstract

An account is given of the design (covered by Soviet patent No. 709018) of a special seed-drill share which incorporates a soil loosening and compacting device, and allows the compaction pressure on the bottom of the drilled furrow to be regulated. This improves the growth of seedlings.

Author(s)
Posharnikov, F. V.
Citation
Lesnoń≠ Zhurnal, 1984, No. 4, pp 124-126
Abstract

The apparatus described comprises a continuous ledge less than 1/2 the width of the articles to be sorted, for supporting one long side of the articles as they are fed endwise, one behind the other, and cooperating local supports for the other long side of each of the articles, successive local...

Author(s)
Serry, V.
Citation
British Patent, 1958, No. 798,556., pp 3
Abstract

Crushed tree bark refuse is mixed with molasses refuse, the pH of which has been lowered to approx equal to 3.5. The mixture is transported in a continuous flow through a rotating and pressurized oven wherein the mixture is heated and toxic substances including bark acids are extracted. Nutrients...

Author(s)
Wahlberg, A. O.
Citation
Canadian Patent, 1981, 1,110,864, pp 6 pp.
Abstract

cf. F.A. 18 No. 4703.] The wood is inoculated with a wood-destroying fungus and exposed to its action for periods from 14 days to several months, preferably with an interruption for air-drying. it can be further disintegrated by chemical means or it can be impregnated. KEYWORDS: Decayed wood,...

Author(s)
Luthardt, W.
Citation
German Patent, 1956, No. 946,845,
Abstract

The broadest form of the preservative comprises 2 gram atoms of hexavalent Cr in the form of alkali metal salts of H2CrO4 or H2Cr2O7 or in the form of H2CrO4, 6 mmols of alkali metal fluoride and/or nmols of alkali arsenate wherein m + n = 2, and from 0.2 to 1.2 times as much of H equivalents in...

Author(s)
Allgemeine-Holzimpragnierung-Dr. -Wolman-GmbH.
Citation
British Patent, 1958, No. 796,871., pp 6
Abstract

Methods are given for depositing an insoluble Zn salt on the walls of the pores of wood. The treated wood is fire-resistant, toxic to fungi and to termites, repellent to marine borers, non-hygroscopic, machinable and paintable. An example of a treatment is described. KEYWORDS: wood preservation \...

Author(s)
Depew, H. A.; Waitkins, G. R.
Citation
U.S. Patent, 1958, No. 2,838,424,

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