US3985175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam plastic injection molding
Assignee: Dow Chemical Co
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Filing: 1974-09-13
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Granted: 1976-10-12
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Expires: 1994-09-13
Abstract
Abstract Injection molded plastic doors having only one face of the door exposed to view in an intended installation are prepared by injection molding a foam plastic door and providing a box beam generally centrally disposed within the door on the usually nonvisible face. Lightweight and high strength are obtained. Such doors are very satisfactory for folding closet door applications.
Inventors
- 👤 Kenneth J. Pukl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
195 words
A foamed synthetic resinous plastic door, the foam plastic door having a generally rectangular configuration, the door having a finished or exposed surface and a nonexposed or hidden surface, the door having a peripheral flange portion of generally rectangular configuration extending away from and generally normal to the exposed surface, the door having first and second major edges generally oppositely disposed, the major edges being in generally parallel relationship, the door having first and second end portions generally oppositely disposed, at least first and second reinforcing members affixed to the hidden surface, the first and second reinforcing members being in generally parallel relationship, the first and second reinforcing members extending between flange portions at the first end portion and the second end portion, the reinforcing members being affixed to the nonexposed surface and adjacent flange portions, a plate-like member is disposed generally adjacent the nonexposed side and remote from the exposed side, the plate-like member affixed to and terminating at said reinforcing members at locations remote from nonexposed side and the plate-like planar member extending at least half the distance that the ribs extend, the plate-like member being generally centrally located relative to the door.
Claim 2
Dependent Claim
195 words
A foamed synthetic resinous plastic door, the foam plastic door having a generally rectangular configuration, the door having a finished or exposed surface and a nonexposed or hidden surface, the door having a peripheral flange portion of generally rectangular configuration extending away from and generally normal to the exposed surface, the door having first and second major edges generally oppositely disposed, the major edges being in generally parallel relationship, the door having first and second end portions generally oppositely disposed, at least first and second reinforcing members affixed to the hidden surface, the first and second reinforcing members being in generally parallel relationship, the first and second reinforcing members extending between flange portions at the first end portion and the second end portion, the reinforcing members being affixed to the nonexposed surface and adjacent flange portions, a plate-like member is disposed generally adjacent the nonexposed side and remote from the exposed side, the plate-like member affixed to and terminating at said reinforcing members at locations remote from nonexposed side and the plate-like planar member extending at least half the distance that the ribs extend, the plate-like member being generally centrally located relative to the door.
Claim 3
Dependent Claim
35 words
The door of claim 1 having a width w wherein the first and second reinforcing members are spaced from the nearest adjacent major edges, a distance of a, and w/a is from 2 to 5.
Claim 4
Dependent Claim
12 words
The door of claim 2 wherein w/a is from 2.5 to 3.5.
Claim 5
Dependent Claim
10 words
The door of claim 3 wherein w/a is about 3.
Claim 6
Dependent Claim
25 words
The door of claim 1 including a plurality of transverse rib members extending generally normal to the reinforcing members and affixed to the hidden surface.
Claim 7
Dependent Claim
44 words
The door of claim 1 wherein the plate-like member is adhered to plates extending between the reinforcing members and affixed to the hidden surface, the plates extending generally normally to the hidden surface and being disposed generally adjacent the first and second end portions.
Claim 8
Dependent Claim
30 words
Two doors in accordance with claim 1 each hingedly affixed to the other along a major edge thereof and when in generally coplanar relationship having their visible surfaces generally coplanar.
References Cited (Backward Citations)
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Cited
US3546841A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |