Patent US3850678A successfully refreshed from Google Patents.
US3850678A
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Pentachlorophenol coated with a polyglycol
Assignee: Dow Chemical Co
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Filing: 1973-04-02
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Granted: 1974-11-26
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Expires: 1993-04-02
Abstract
Abstract Free flowing particulate pentachlorophenol having less tendency to bloom is obtained by incorporating about 0.3-1 percent by weight of polyethylene glycol of at least 200 molecular weight or polypropylene glycol of 200-300 molecular weight. Pentachlorophenol prills coated with the polyglycol are a preferred form.
Inventors
- 👤 W Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:13
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
FREE FLOWING PARTICULATE PENTACHLOROPHENOL CONSISTING ESSENTIALLY OF PENTACHLOROPHENOL AND ABOUT 0.3 TO ABOUT ONE PERCENT BY WEIGHT OF AT LEAST ONE POLYGLYCOL OF THE GROUP CONSISTING OF POLYETHYLENE GLYCOL OF AT LEAST ABOUT 200 AVERAGE MOLECULAR WEIGHT AND POLYPROPYLENE GLYCOL OF ABOUT 200-300 AVERAGE MOLECULAR WEIGHT.
Claim 2
Dependent Claim
46 words
FREE FLOWING PARTICULATE PENTACHLOROPHENOL CONSISTING ESSENTIALLY OF PENTACHLOROPHENOL AND ABOUT 0.3 TO ABOUT ONE PERCENT BY WEIGHT OF AT LEAST ONE POLYGLYCOL OF THE GROUP CONSISTING OF POLYETHYLENE GLYCOL OF AT LEAST ABOUT 200 AVERAGE MOLECULAR WEIGHT AND POLYPROPYLENE GLYCOL OF ABOUT 200-300 AVERAGE MOLECULAR WEIGHT.
Claim 3
Dependent Claim
18 words
The pentachlorophenol of claim 1 wherein the pentachlorophenol is in the form of prills coated with the polyglycol.
Claim 4
Dependent Claim
17 words
The pentachlorophenol of claim 2 wherein the polyglycol is polyethylene glycol of about 200-20,000 average molecular weight.
References Cited (Backward Citations)
CA675230A
Cited
US2604469A
Cited
US2944936A
Cited
US3590101A
Cited
US3646225A
Cited
US3692561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |