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US4210073A
Expired / Lapsed
US
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Portable environmental chamber
Assignee: Individual
•
Filing: 1978-12-26
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Granted: 1980-07-01
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Expires: 1998-12-26
Abstract
Abstract The present invention relates to a portable environmental chamber comprising a tent-like structure having an integral heating means associated therewith. More specifically, it relates to a collapsible food preparation and processing device having a combination heat retaining foldable closure and a heating means for providing a predetermined temperature within said closure, the heating means integrally associated with the closure means.
Inventors
- 👤 Margaret R. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:07
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; A47J36/2483
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A portable environmental chamber for home food preparation and processing uses comprising (a) a continuous, upstanding wall member consisting of a laminate having an outer and inner layer of plastic foil with a scrim held between said layers; (b) a cover member associated with said wall member to define, in combination, a closure having a single, planar opening, said closure, when disposed on a flat supporting surface, forming with said surface a totally enclosed chamber, said wall and cover members being composed of flexible material whereby said closure is collapsible; and (c) an electrical resistance wire heating means attached to said scrim in said wall member in a substantially evenly distributed pattern for providing a substantially uniform controlled radiation of heat into said enclosed chamber whereby a constant predetermined temperature can be attained within said chamber.
Claim 2
Dependent Claim
136 words
A portable environmental chamber for home food preparation and processing uses comprising (a) a continuous, upstanding wall member consisting of a laminate having an outer and inner layer of plastic foil with a scrim held between said layers; (b) a cover member associated with said wall member to define, in combination, a closure having a single, planar opening, said closure, when disposed on a flat supporting surface, forming with said surface a totally enclosed chamber, said wall and cover members being composed of flexible material whereby said closure is collapsible; and (c) an electrical resistance wire heating means attached to said scrim in said wall member in a substantially evenly distributed pattern for providing a substantially uniform controlled radiation of heat into said enclosed chamber whereby a constant predetermined temperature can be attained within said chamber.
Claim 3
Dependent Claim
38 words
The chamber of claim 1 wherein said electrical resistance wire heating means is capable of radiating sufficient heat to provide a constant temperature within said chamber in room temperature surroundings of between about 27° C. and 30° C.
Claim 4
Dependent Claim
12 words
The chamber of claim 1 wherein said upstanding wall member is cylindrical.
Claim 5
Dependent Claim
11 words
The chamber of claim 3 wherein said cover member is dome-shaped.
Claim 6
Dependent Claim
17 words
The chamber of claim 4 wherein said wall member is opaque and said cover member is transparent.
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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) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |