US4829045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peat pellets
Assignee: NOVA-HUSKY RESEARCH Corp Ltd 1411 - 25TH AVENUE NE CALGARY ALBERTA CANADA T2E 7L6
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Filing: 1986-07-07
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Granted: 1989-05-09
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Expires: 2006-07-07
Abstract
Abstract Peat is provided in the form of pellets for use in absorbing liquids and breaking emulsions. The hydrophilic/hydrophobic properties of the pellets may be varied, depending on the manner of drying. Calcium sulphate may be used as a binder, fire-retardant, absorbency enhancement, and emulsion breaker.
Inventors
- 👤 Peter B. Fransham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:57
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32; A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0155; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/04; B01D17/045; B01J; B01J20/00; B01J20/22; B01J20/24; C02; C02F; C02F1/00; C02F1/68; C02F1/681
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
33 words
Peat in the form of pellets which have been dried to a moisture content of less than about 10 weight % in such manner as to substantially retain the hydrophilicity of said peat.
Claim 2
Dependent Claim
33 words
Peat in the form of pellets which have been dried to a moisture content of less than about 10 weight % in such manner as to substantially retain the hydrophilicity of said peat.
Claim 3
Dependent Claim
17 words
The peat pellets of claim 1 which are heat treated to decrease the hydrophilicity of the pellets.
Claim 4
Dependent Claim
31 words
Peat in the form of pellets which have been dried to a moisture content of less than about 10 weight % in such manner as to render the peat substantially hydrophobic.
Claim 5
Dependent Claim
31 words
Peat in the form of pellets which have been dried to a moisture content of less than about 10 weight % in such manner as to render the peat substantially hydrophobic.
Claim 6
Dependent Claim
13 words
The peat pellets of claim 1 wherein said peat is substantially fibrous peat.
Claim 7
Dependent Claim
29 words
The peat pellets of claim 4 which have a diameter from about 1/8 to about 1/2 inch and a length to diameter ratio from about 0.5:1 to about 2:1.
Claim 8
Independent Claim
59 words
A method of forming peat pellets suitable for use as an absorbent material, which comprises: providing peat at an intermediate moisture level of about 35 to about 60 wt. %, pelletizing the peat at said intermediate moisture level to provide peat pellets, and drying said peat pellets to a final moisture content of less than about 10 wt. %.
Claim 9
Independent Claim
59 words
A method of forming peat pellets suitable for use as an absorbent material, which comprises: providing peat at an intermediate moisture level of about 35 to about 60 wt. %, pelletizing the peat at said intermediate moisture level to provide peat pellets, and drying said peat pellets to a final moisture content of less than about 10 wt. %.
Claim 10
Dependent Claim
35 words
The method of claim 6 wherein said peat pellets are dried to the final moisture content by oven drying at a temperature of at least about 100° C., thereby to impart hydrophobicity to the pellets.
Claim 11
Dependent Claim
33 words
The method of claim 6 wherein said peat pellets are dried to the final moisture content by air drying at a temperature below about 100° C., thereby to retain hydrophilicity of the peat.
Claim 12
Dependent Claim
23 words
The method of claim 8 wherein said air dried pellets are heat treated at elevated temperature to decrease the hydrophilicity of the pellets.
Claim 13
Dependent Claim
12 words
The method of claim 6 wherein said peat is substantially fibrous peat.
Claim 14
Independent Claim
106 words
A method for forming peat pellets suitable for use as an absorbent material which comprises peat which is substantially fibrous and having an intermediate moisture level of about 35 to 60 weight percent, pelletizing said peat at said intermediate moisture level to provide peat pellets having a diameter of from 1/8 inch to about 1/2 inch and a length to diameter ratio of about 0.5:1 to about 2:1, and air drying said peat pellets at a temperature of at least 100° C. thereby to impart hydrophobicity to the pellets and wherein said pellets have a final moisture content of about 5 to about 10 weight percent.
Claim 15
Independent Claim
106 words
A method for forming peat pellets suitable for use as an absorbent material which comprises peat which is substantially fibrous and having an intermediate moisture level of about 35 to 60 weight percent, pelletizing said peat at said intermediate moisture level to provide peat pellets having a diameter of from 1/8 inch to about 1/2 inch and a length to diameter ratio of about 0.5:1 to about 2:1, and air drying said peat pellets at a temperature of at least 100° C. thereby to impart hydrophobicity to the pellets and wherein said pellets have a final moisture content of about 5 to about 10 weight percent.
References Cited (Backward Citations)
US737023A
Cited
GB191512003A
Cited
DE572866C
Cited
US2163860A
Cited
FR979453A
Cited
DE2010500A1
Cited
US3791990A
Cited
US4206080A
Cited
SU717122A1
Cited
CA1160201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |