Patent US4487117A successfully refreshed from Google Patents.
US4487117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking appliance with lid and open work basket
Assignee: ITT Inc
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Filing: 1983-10-07
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Granted: 1984-12-11
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Expires: 2003-10-07
Abstract
Abstract A cooking appliance including a vat for containing food during cooking, having a lid for engaging the vat. The lid has a transparent portion forming a double window consisting exclusively of an upper window and a lower window congruently placed on top of each other and an air space sealed therebetween, such that the lower window is exposed to cooking vapors emanating from the vat and the upper window is exposed to the outside atmosphere. Improved visibility through the windows is obtained during cooking. The upper and lower windows comprise a single unitary closed shell surrounding the air space.
Inventors
- 👤 Jacques L. J. Colley
- 👤 Andr/e/ P. J. Vrydags
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:45
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/12; A47J37/1276; A47J37/128; A47J36/00; A47J36/38; A47J37/1204; A47J37/1295
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A cooking appliance including: a vat for containing food during cooking, and lid means for engaging said vat, said lid means having a transparent portion forming a double window consisting exclusively of an upper window and a lower window congruently placed on top of each other and an air space sealed there-between, such that said lower window is exposed to cooking vapors emanating from said vat and said upper window is exposed to the outside atmosphere whereby improved visibility through said windows is obtained during cooking, and wherein said upper and lower windows comprise a single unitary closed shell surrounding said air space; an upper lid cover mounted on said lid means, said upper lid cover and said lid means having openings with edge sections, and wherein said upper and said lower windows are provided with external rims at the outer peripheries, said rims being mounted between said edge sections of said openings in said upper lid cover and said lid means such that windows are incorporated in said lid.
Claim 2
Dependent Claim
170 words
A cooking appliance including: a vat for containing food during cooking, and lid means for engaging said vat, said lid means having a transparent portion forming a double window consisting exclusively of an upper window and a lower window congruently placed on top of each other and an air space sealed there-between, such that said lower window is exposed to cooking vapors emanating from said vat and said upper window is exposed to the outside atmosphere whereby improved visibility through said windows is obtained during cooking, and wherein said upper and lower windows comprise a single unitary closed shell surrounding said air space; an upper lid cover mounted on said lid means, said upper lid cover and said lid means having openings with edge sections, and wherein said upper and said lower windows are provided with external rims at the outer peripheries, said rims being mounted between said edge sections of said openings in said upper lid cover and said lid means such that windows are incorporated in said lid.
Claim 3
Dependent Claim
28 words
A cooking appliance as claimed in claim 1, wherein said lid means is comprised of metal to provide good thermal contact between said vat and said lower window.
Claim 4
Dependent Claim
36 words
A cooking appliance as claimed in claim 1 wherein said windows are comprised of a polyamide 12 material with aliphatic, cyclo-aliphatic and aromatic base, said windows being transparent and resistant to heat, oil and grease vapors.
Claim 5
Dependent Claim
26 words
Cooking appliance as claimed in claim 1, wherein said lower window includes a plane inclined downwardly in the direction of the wall of the appliance vat.
Claim 6
Dependent Claim
38 words
A cooking appliance as claimed in claim 6 wherein said lid means is circular in shape and said windows are included within a segment of said lid and further including a complementary segment having therein an odor filter.
Claim 7
Dependent Claim
24 words
A cooking appliance as claimed in claim 5, wherein said lower window includes a curved part climbing towards the edge of the said vat.
Claim 8
Dependent Claim
45 words
A cooking appliance as claimed in claim 1 wherein said upper window is shaped to include a horizontal surface and a substantially vertical wall disposed between said horizontal surface and said rims and wherein said opening in said upper lid cover surrounds said vertical wall.
Claim 9
Dependent Claim
48 words
A cooking appliance as claimed in claim 1, wherein said upper and lower windows are molded from two half-shells each being terminated by a rim and wherein said rims are joined by ultrasonic welding such that said rim is squeezed between said lid and said upper lid cover.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |