US4072548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel door and method of construction
Assignee: Individual
•
Filing: 1976-12-27
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Granted: 1978-02-07
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Expires: 1996-12-27
Abstract
Abstract A panel door comprised of a rectangular wood frame defining a generally rectangular central opening which may be subdivided by one or two spaced apart transverse frame members to define two or three smaller central openings. A thin plywood panel is laminated to a front side of the door and routed out in the central open area or areas and a reinforced polyurethane sculptured panel is molded into each opening. A thin plywood panel is laminated to the back side of the door. Both the front and back plywood panels are prelaminated with a polyvinyl chloride film.
Inventors
- 👤 Howard S. Gerson
- 👤 Bernard Gerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
B; B32; B32B; B32B21/00; B32B21/04; B32B21/08; B32B27/00; B32B27/30; B32B27/304; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; E04C2/30; E04C2/38; E04C2/386; E06; E06B; E06B3/00; E06B3/70; E06B3/7001; E06B3/72; E06B3/78; B32B2607/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
235 words
Method of constructing a panel door comprising the steps of: a. Constructing a rectangular skeletal frame having outside and inside faces and defining at least one rectangular opening in a central portion thereof, providing a rectangular mold having a design side and sizing said rectangular opening to said mold prior to assembling said skeletal frame as by staples, b. laminating a sheet of plywood in a covering relation to said outside face, c. simultaneously routing out a central portion of said plywood sheet and a peripheral edge portion of said rectangular opening to form a simulated molding strip around said rectangular opening, d. routing out a key groove in said skeletal frame within and around said rectangular opening, e. placing said mold in said rectangular opening with said outside face in a down position and said mold design side in an up position and distributing foamable liquid polyurethane over said design side after spraying said design side with a release agent, f. placing a sheet of polyvinyl chloride over said inside face, g. placing the door in a press under pressure, sandwiched between said polyvinyl chloride sheet and a protective sheet of material on said outside face for a predetermined period of time until said polyurethane expands and hardens, h. remove said door from said press and said sheets and mold from said door, i. laminate a sheet of polyvinyl chloride over said inside surface.
Claim 2
Dependent Claim
235 words
Method of constructing a panel door comprising the steps of: a. Constructing a rectangular skeletal frame having outside and inside faces and defining at least one rectangular opening in a central portion thereof, providing a rectangular mold having a design side and sizing said rectangular opening to said mold prior to assembling said skeletal frame as by staples, b. laminating a sheet of plywood in a covering relation to said outside face, c. simultaneously routing out a central portion of said plywood sheet and a peripheral edge portion of said rectangular opening to form a simulated molding strip around said rectangular opening, d. routing out a key groove in said skeletal frame within and around said rectangular opening, e. placing said mold in said rectangular opening with said outside face in a down position and said mold design side in an up position and distributing foamable liquid polyurethane over said design side after spraying said design side with a release agent, f. placing a sheet of polyvinyl chloride over said inside face, g. placing the door in a press under pressure, sandwiched between said polyvinyl chloride sheet and a protective sheet of material on said outside face for a predetermined period of time until said polyurethane expands and hardens, h. remove said door from said press and said sheets and mold from said door, i. laminate a sheet of polyvinyl chloride over said inside surface.
Claim 3
Dependent Claim
35 words
The method as defined in claim 1 including the step of placing a reinforcing insulation panel in said rectangular opening atop said liquid polyurethane prior to placing said polyvinyl chloride sheet over said inside face.
Claim 4
Dependent Claim
27 words
The method as defined in claim 1 wherein the outside surfaces of said inside and outside plywood sheets are prelaminated with a thin film of polyvinyl chloride.
Claim 5
Dependent Claim
32 words
The method as defined in claim 2 wherein at least one transverse frame member is fixed in said skeletal frame to divide said rectangular opening into at least two smaller rectangular openings.
Claim 6
Dependent Claim
16 words
The method as defined in claim 4 including one of said molds for each rectangular opening.
References Cited (Backward Citations)
US3402520A
Cited
US3700516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |