US3813236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release pesticide compositions and method of using
Assignee: Weyerhaeuser Co
•
Filing: 1970-12-28
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Granted: 1974-05-28
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Expires: 1990-12-28
Abstract
Abstract ORGANIC PERTICIDES ARE CHEMICALLY COMBINED WITH AN INERT NATURAL POLYMER SUBSTRATE SUCH AS A LIGNIN OR LIGNIN CONTAINING MATERIAL TREE BARK CELLULOSE OR PROTEINACEOUS MATERIAL. WHEN EXPOSED TO ENVIROMENTAL CONDITIONS THE CHEMICAL BOND BETWEEN THE POLYMER AND THE PESTICIDE IS BROKEN BY HYDROLYSIS TO YIELD A PESTICIDE AMOUNT OF THE FREE PESTICIDE OVER AN EXTENDED PERIOD OF TIME.
Inventors
- 👤 G Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:34
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08; A01N25/10
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |