Patent US3950894A successfully refreshed from Google Patents.
US3950894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced polyester door
Assignee: THERMA-TRU HOLDINGS Inc
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Filing: 1974-02-22
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Granted: 1976-04-20
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Expires: 1994-02-22
Abstract
Abstract A reinforced polyester door is disclosed. The door has an interior supporting frame, rigid front and back surface skins, an insulating foam layer between the front and back surface, and a reinforcing member adjacent the latch side of the door. Magnetizable particles are preferably placed within the front surface skin along the periphery of the door.
Inventors
- 👤 Vincent DiMaio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:31
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/72; E06B3/78; E06B3/7001; E06B3/7015; E06B2003/7023; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S52/00; Y10S52/04; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A door structure, having a latch edge and a hinge edge, comprising in combination, an interior supporting frame, rigid front and back surface skins formed of polyester resin reinforced with glass fibers positioned in opposed relationship to one another adjacent said frame, an insulating foam layer bonded between said front and back skins within said frame, said supporting frame including a vertically extending recess adjacent said latch edge having a reinforcing member positioned within said recess extending and integrally bonded adjacent said front surface skin along said latch edge, and a plurality of magnetizable particles positioned along at least a portion of the periphery of said front surface skin.
Claim 2
Dependent Claim
109 words
A door structure, having a latch edge and a hinge edge, comprising in combination, an interior supporting frame, rigid front and back surface skins formed of polyester resin reinforced with glass fibers positioned in opposed relationship to one another adjacent said frame, an insulating foam layer bonded between said front and back skins within said frame, said supporting frame including a vertically extending recess adjacent said latch edge having a reinforcing member positioned within said recess extending and integrally bonded adjacent said front surface skin along said latch edge, and a plurality of magnetizable particles positioned along at least a portion of the periphery of said front surface skin.
Claim 3
Dependent Claim
22 words
A door structure, according to claim 1, wherein the reinforcing member is a steel strap integrally bonded to said front surface skin.
Claim 4
Dependent Claim
21 words
A door structure, according to claim 1, wherein said front and back skin each include a reinforcing glass fiber mat layer.
Claim 5
Dependent Claim
14 words
A door structure, according to claim 1, wherein the polyester resin includes a filler.
Claim 6
Dependent Claim
19 words
A door structure, according to claim 1, wherein said front and back skins include an outer gel coat layer.
Claim 7
Dependent Claim
19 words
A door structure, according to claim 1, wherein said front and back skins define a simulated wood carved pattern.
Claim 8
Dependent Claim
29 words
A door structure according to claim 1 wherein said front and back surface skins comprise a polyester resin and a glass fiber mat, said polyester resin including a filler.
Claim 9
Dependent Claim
43 words
A door structure according to claim 1, having a second vertically extending recess, said second recess being adjacent said hinge edge and a second reinforcing member positioned within said second recess, said second reinforcing member being integrally bonded adjacent said front surface skin.
References Cited (Backward Citations)
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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) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |