Patent US3603643A successfully refreshed from Google Patents.
US3603643A
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US
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Method of separating peat into fibrous substance and humic substance
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1969-08-08
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Granted: 1971-09-07
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Expires: 1989-08-08
Abstract
Abstract Method of separating peat into its fibrous component and humic component comprising mining peat in the water existing in a peat bed to form a peat slurry, disintegrating it to suspend the fibrous component and humic component in the water, and separating the fibrous component from the humic component suspended in the water.
Inventors
- 👤 Masao Hirota
- 👤 Kazumi Nakarai
- 👤 Kenji Io
- 👤 Keiji Tanaka
- 👤 Katsuji Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:59
CPC Classifications
C; C10; C10F; C10F7/00; B; B01; B01J; B01J2/00; B01J2/28; C05; C05B; C05B19/00; C05F; C05F11/00; C05F11/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
Method as claimed in claim 1 wherein the separated fibrous component is mechanically dehydrated and compressed to a bulk specific gravity of 0.3 to 0.4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |