Patent US3979872A successfully refreshed from Google Patents.
US3979872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yieldable door body
Assignee: Eckel Ind Inc
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Filing: 1972-03-02
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Granted: 1976-09-14
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Expires: 1992-03-02
Abstract
Abstract A door body formed largely of yieldable material has two panels spaced apart with a hollow separator between them that is rectangular in cross section and has two pairs of oppositely disposed sides and two dividers therein at right angles to each other that thereby provide four enclosed openings. This construction holds the paneled portion of the door body firm, especially at the outer edges, yet is flexible enough to permit some distortion when the door is forcibly opened as by striking it vigorously with a moving truck.
Inventors
- 👤 Henry R. Gilchrist
- 👤 Hollis M. Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
A door body comprising yieldable front and rear panels spaced apart, and a yieldable separator between said panels having two pairs of oppositely disposed sides spaced apart defining a closed rectangle, and having two dividers extending between and spaced respectively from said two pairs of said sides to thereby define four openings in said separator.
Claim 2
Dependent Claim
55 words
A door body comprising yieldable front and rear panels spaced apart, and a yieldable separator between said panels having two pairs of oppositely disposed sides spaced apart defining a closed rectangle, and having two dividers extending between and spaced respectively from said two pairs of said sides to thereby define four openings in said separator.
Claim 3
Dependent Claim
16 words
A door body as of claim 1, said separator extending adjacent an edge of said body.
Claim 4
Dependent Claim
23 words
A door body as of claim 1, and another said separator extending horizontally between said two panels adjacent another edge of said body.
Claim 5
Dependent Claim
18 words
A door body as of claim 1, and another said separator extending intermediate opposite sides of said body.
Claim 6
Dependent Claim
49 words
A door body as of claim 1, said separator extending vertically adjacent an outer edge of said body, and a plurality of other said separators one of which extends adjacent the bottom extremity of said body and another of which plurality extends adjacent the upper extremity of said door.
Claim 7
Dependent Claim
53 words
A door body as of claim 1, said separator extending vertically adjacent an outer edge of said body, and a tubular-shaped nose at the outer extremity of said body and having two portions extending laterally inward between said panels, said separator extending between said opposite nose portions and directly inward of said panels.
Claim 8
Dependent Claim
40 words
A door body as of claim 1 and another said separator, a first of said separators extending horizontally of said body and a second of said separators extending from and in contact with said first separator vertically of said body.
References Cited (Backward Citations)
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US3579724A
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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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |