Patent US1691647A successfully refreshed from Google Patents.
Patent US3617565A successfully refreshed from Google Patents.
US3617565A
Expired / Lapsed
US
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Method and means for the absorption of petroleum products
Assignee: Individual
•
Filing: 1968-05-24
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Granted: 1971-11-02
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Expires: 1988-05-24
Abstract
Abstract The absorption of petroleum products is attained by bringing bark from trees belonging to the order Coniferae into contact with the petroleum products. The absorption facilitates the collection and removal of the products from a substrate such as a water surface or a solid base.
Inventors
- 👤 Hans Erik Fahlvik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01J; B01J20/00; B01J20/22; B01J20/24; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
The method of claim 1 wherein said bark is from trees belonging to the Pinaceae family.
Claim 2
Dependent Claim
15 words
The method of claim 1 wherein said bark is from trees belonging to the Taxodiaceae.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said bark is from trees belonging to the genus Pinus.
Claim 4
Dependent Claim
33 words
The method according to claim 1 wherein said bark is from trees selected from the group of species consisting of Pinus silvatica, Pinus ponderosa, Pinus strobus, Pinus nigra, Pinus taeda, and mixtures thereof.
Claim 5
Dependent Claim
39 words
The method according to claim 1 wherein said bark is from trees selected from the group of species consisting of Abies alba, Abies concolor, Tsuga canadensis, Pseudotsuga douglasii, Pseudotsuga viridis, Pseudotsuga glauca, Picea abies, Picea pungens and mixtures thereof.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said bark is from trees of the species Sequoia sempervirens.
Claim 7
Dependent Claim
48 words
The method of claim 1 wherein said bark mainly consists of bark taken from tree trunks having a ripping bark layer the average thickness of which being at least 5 mm., said bark having the ability of floating on water for a period of at least 10 hours.
Claim 8
Dependent Claim
31 words
The method of claim 1 wherein said bark consists essentially of ground bark the particles of which can be passed through a sieve having a mesh width of approximately 2 cm.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein said bark consists essentially of bark pieces of the overall cross section dimension of which as an average being larger than approximately 2 cm.
Claim 10
Dependent Claim
23 words
The method of claim 20 wherein said bark is enclosed in a tubular net the diameter of which is at least 15 cm.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |