US3579937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam plastic panel without truss members
Assignee: EDWARD E LUKENS
•
Filing: 1969-05-29
•
Granted: 1971-05-25
•
Expires: 1989-05-29
Abstract
Abstract A lightweight insulating panel is provided of large area suitable for building use which consists of a hard top and immediately there-below a lath or wire mesh with truss members fastened to the lath and rigid plastic foam surrounding the lath and the truss members.
Inventors
- 👤 Edward E Lukens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; E04C2/30; E04C2/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A panel as defined in claim 1 in which said covering member extends in enclosing relation to said truss members.
Claim 2
Dependent Claim
16 words
A panel as defined in claim 1 in which said foraminous lamina is of metal lath.
Claim 3
Dependent Claim
16 words
A panel as defined in claim 1 in which said foraminous lamina is of wire mesh.
Claim 4
Dependent Claim
16 words
A panel as defined in claim 1 in which said truss members are bar joist members.
References Cited (Backward Citations)
US2053873A
Cited
US2268311A
Cited
US3246058A
Cited
US3270103A
Cited
US3157144A
Cited
US3305991A
Cited
US3484331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |