Patent US3831317A successfully refreshed from Google Patents.
US3831317A
Expired / Lapsed
US
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Agricultural substrates
Assignee: Rhodiaceta SA
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Filing: 1973-03-29
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Granted: 1974-08-27
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Expires: 1993-03-29
Abstract
Abstract A synthetic culture medium comprising a polymeric material having an apparent density of 0.01 and 0.5 and a specific surface area of between 2 and 25 m2/g, the polymeric material being in the form of an amorphous fibril. Such polymeric materials include thermoplastic polymers such as film-forming linear super polyamides, film-forming polyesters, vinly polymers, acrylonitrile base polymers, and polyolefins, the fibrils being suitable for use as a culture medium either alone or in combination with soil, sand and the like so as to provide a more readily aeratable mixture. Plant growth is improved by a process utilizing such synthetic culture medium.
Inventors
- 👤 P Porte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:15
CPC Classifications
A; A01; A01G; A01G24/00; A01G24/30; A01G24/40; A01G24/42; Y; Y10; Y10S; Y10S47/00; Y10S47/10; Y10S71/00; Y10S71/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
12 words
The process of claim 1 wherein the pulp comprises a thermoplastic polymer.
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein said pulp is a polyamide.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said pulp is a polyester.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said pulp is intimately mixed with said soil and comprises from 1 to 80 percent by weight of the mixture.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said pulp forms a discrete layer on said soil.
Claim 6
Independent Claim
59 words
A method for increasing the growth ability of plants which comprises germinating seeds of said plants in a synthetic culture medium comprising a thermoplastic synthetic polymeric pulp having an apparent density of from about 0.01 to about 0.5 and a specific surface area of from about 2 to 25 m2/g, said pulp being insoluble in water at ambient temperature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |