US4311477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag for cultivating mushrooms
Assignee: Daicel Corp
•
Filing: 1979-12-26
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Granted: 1982-01-19
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Expires: 1999-12-26
Abstract
Abstract A bag for cultivating mushrooms constructed at least in part from a microporous film which has gas-permeability but does not pass bacteria and infectious microbes.
Inventors
- 👤 Ryutaro Kitamura
- 👤 Hirotsugu Masubayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:28
CPC Classifications
A; A01; A01G; A01G18/00; A01G18/60; A01G18/64; A01G18/66; Y; Y10; Y10S; Y10S493/00; Y10S493/941
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A process for the preparation of a bag suitable for cultivating mushrooms, said process comprising sealing a continuous strip of non-porous film to a continuous strip of polypropylene microporous film reinforced with a non-woven polypropylene web, longitudinally folding the bicomponent sealed strip on itself and sealing the ends thereof, so as to form a continuous tube, cutting said tube into sealable lengths and sealing one end of each of said lengths.
Claim 2
Dependent Claim
71 words
A process for the preparation of a bag suitable for cultivating mushrooms, said process comprising sealing a continuous strip of non-porous film to a continuous strip of polypropylene microporous film reinforced with a non-woven polypropylene web, longitudinally folding the bicomponent sealed strip on itself and sealing the ends thereof, so as to form a continuous tube, cutting said tube into sealable lengths and sealing one end of each of said lengths.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said non-porous film is polypropylene film.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said sealing operations are heat-sealing operations.
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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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |