Wood preservative concentrate

Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Heavy metal or compound thereof

Reexamination Certificate

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Details

C424S600000, C424S617000, C424S630000, C424S631000, C424S632000, C424S633000, C424S634000, C424S637000, C424S638000, C424S641000, C424S657000, C424S658000, C424S659000, C424S660000, C424S686000, C424S687000, C424S700000, C424S715000, C424S716000, C424S717000, C424S719000, C424S720000, C424S721000, C424SDIG001, C424SDIG001, C514S494000, C514S499000, C514S500000, C514S553000, C514S557000, C106S018300, C106S018320, C106S015050

Reexamination Certificate

active

06896908

ABSTRACT:
This invention relates to a leach-resistant borate preservative for lignocellulosic-based products, providing resistance against insect and fungal attack for use in exterior and ground contact applications. The preservative compositions of this invention may be provided as a high strength liquid concentrate, suitable for transportation, storage and easy on-site dilution, or as a ready-to-use treatment solution. These wood preservative compositions include a borate preservative component and a co-biocidal metal fixative such as copper or zinc. The preservative compositions also contain volatile organic acid, free ammonia and ammonium salts to aid dissolution. Methods for the application of these preservative compositions to wood are also provided.

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Kalnins, A., Ermuss, N., Svarcs, E., Ievins, A. and Podina, I., “New copper and boron-containing wood preservatives”, Latv.PSR Zinat. Akad. Vestis, 1969, (8) pp. 64-66. (Chemical Abstract and English Translation only).
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Kalnins A., Ermuss N. and Pastors N., “Study of preservatives containing copper and boron”, Mikroorganizmy I Nizsh. Rast. Razrushiteli Materialov I Izdellii, M., pp. 176-180, 1979. (Russian and Chemical Abstract No. CA 93:97058).
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Lloyd, J.D., “Leaching of boron wood preservatives—a reappraisal”, Proceedings of the British Wood Preservation and Damp Proofing Association Annual Convention, 1995.
Hedley, M., Wakeling R., Foster, J. and Patterson, B., “Performance of copper-chrome formulations in ground contact in five test sites in New Zealand”, Proceedings of the 27th Annual Mtg of the Int'l Research Group on Wood Preservation, Doc. No. IRG/WP/96-30113, May 19-24, 1996.
Dev, I., Bagga, J.K., Misra, S.C. and Kumar, S., “Termite resistance and permanency tests on zinc-borate—an environmental friendly preservative”, J. Timb. Dev. Assoc. (India), vol. XLIII, No. 2, Apr. 1997, pp. 10-15.

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