Patent US4428984A successfully refreshed from Google Patents.
US4428984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing dusts
Assignee: NOF Corp
•
Filing: 1982-06-11
•
Granted: 1984-01-31
•
Expires: 2002-06-11
Abstract
Abstract Dusts can be effectively prevented by spreading an aqueous solution containing both nonionic surface active agent and polyhydric alcohol on the substances which develop dusts.
Inventors
- 👤 Hirozumi Shimizu
- 👤 Noboru Kiso
- 👤 Taizo Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:29
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
A method of preventing dust comprising spreading an aqueous solution consisting essentially of water and 0.01-10% by weight of each of a nonionic surface active agent and a polyhydric alcohol on the substances which develop dust, said nonionic surface active agent being selected from polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether and polyoxyethylene fatty acid ester, and said polyhydric alcohol being selected from ethylene glycol, glycerine, sorbitol and polyethylene glycol.
Claim 2
Independent Claim
69 words
A method of preventing dust comprising spreading an aqueous solution consisting essentially of water and 0.01-10% by weight of each of a nonionic surface active agent and a polyhydric alcohol on the substances which develop dust, said nonionic surface active agent being selected from polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether and polyoxyethylene fatty acid ester, and said polyhydric alcohol being selected from ethylene glycol, glycerine, sorbitol and polyethylene glycol.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein said nonionic surface active agent is a polyoxyethylene alkyl ether.
Claim 4
Dependent Claim
17 words
A method according to claim 2, wherein said polyoxyethylene alkyl ether is polyoxyethylene (12 moles) dodecyl ether.
Claim 5
Dependent Claim
17 words
A method according to claim 1, wherein said nonionic surface active agent is a polyoxyethylene alkylphenyl ether.
Claim 6
Dependent Claim
17 words
A method according to claim 4, wherein said polyoxyethylene alkylphenyl ether is polyoxyethylene (10 moles) nonylphenyl ether.
Claim 7
Dependent Claim
18 words
A method according to claim 1, wherein said nonionic surface active agent is a polyoxyethylene fatty acid ester.
Claim 8
Dependent Claim
17 words
A method according to claim 6, wherein said polyoxyethylene fatty acid ester is polyoxyethylene (15 moles) monooleate.
Claim 9
Dependent Claim
13 words
A method according to claim 1, wherein said polyhydric alcohol is ethylene glycol.
Claim 10
Dependent Claim
12 words
A method according to claim 1, wherein said polyhydric alcohol is glycerine.
Claim 11
Dependent Claim
12 words
A method according to claim 1, wherein said polyhydric alcohol is sorbitol.
Claim 12
Dependent Claim
13 words
A method according to claim 1, wherein said polyhydric alcohol is polyethylene glycol.
Claim 13
Dependent Claim
32 words
A method according to claim 1, wherein said aqueous solution consists essentially of water and no more than 0.25% by weight of each of said nonionic surface active agent and polyhydric alcohol.
Claim 14
Dependent Claim
29 words
A method according to claim 1, wherein said aqueous solution consists essentially of water and 0.05% by weight of each of said nonionic surface active agent and polyhydric alcohol.
References Cited (Backward Citations)
CA675230A
Cited
US1995598A
Cited
GB677279A
Cited
GB716539A
Cited
DE1946168U
Cited
US3926060A
Cited
US4316811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |