Patent US4405148A successfully refreshed from Google Patents.
US4706418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing cant
Assignee: Industrial Research Development Inc
•
Filing: 1986-08-26
•
Granted: 1987-11-17
•
Expires: 2006-08-26
Abstract
Abstract A hollow tubular roofing cant has a plurality of perforations for permitting ingress of moisture or gases from the roofing system and a plurality of one-way vents for permitting egress of moisture or gases into the atmosphere. The tubular roofing cant may be of triangular or trapezoidal cross-section.
Inventors
- 👤 Victor M. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:03
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/17
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
41 words
A roofing cant comprising tube means having a substantially trapezoidal cross-section for channeling moisture or gases, perforation means for ingress of moisture or gases to the tube means, and venting means for egress of moisture or gases from the tube means.
Claim 2
Dependent Claim
41 words
A roofing cant comprising tube means having a substantially trapezoidal cross-section for channeling moisture or gases, perforation means for ingress of moisture or gases to the tube means, and venting means for egress of moisture or gases from the tube means.
Claim 3
Dependent Claim
22 words
A roofing cant of claim 1 wherein the perforation means is located in at least one of the sides of the cant.
Claim 4
Dependent Claim
23 words
A roofing cant of claim 2 wherein the perforation means is located in at least one of the non-parallel sides of the cant.
Claim 5
Dependent Claim
23 words
A roofing cant of claim 2 wherein the perforation means is located on the shorter of the two parallel sides of the cant.
Claim 6
Dependent Claim
29 words
A roofing cant of claim 2 wherein the perforation means is located in at least one of the non-parallel sides and in the shorter parallel side of the cant.
Claim 7
Dependent Claim
50 words
A roofing cant of claim 5 wherein the perforation means comprises at least one continuous slot, said slot having a first end portion in a first non-parallel side and a second end portion in a second non-parallel side and a bight portion in the shorter parallel side of the cant.
Claim 8
Dependent Claim
18 words
A roofing cant of claim 1 wherein the tube means is perforated at intervals by the venting means.
Claim 9
Dependent Claim
20 words
A roofing cant of claim 7 wherein the venting means is located in the longer parallel side of the cant.
Claim 10
Dependent Claim
25 words
A roofing cant of claim 8 wherein the venting means comprises one-way valve means for preventing re-entry of moisture or gases into the tube means.
Claim 11
Dependent Claim
15 words
A roofing cant of claim 1 wherein the tube means is made from plastic material.
Claim 12
Dependent Claim
15 words
A roofing cant of claim 10 wherein the plastic material is polystyrene or acrylonitrile-butadiene-styrene copolymer.
Claim 13
Dependent Claim
60 words
A roofing cant comprising tube means for channeling moisture or gases, perforation means for ingress of moisture or gases to the tube means, venting means for egress of moisture or gases from the tube means, and flexible, impervious sheet means attached to an outer surface of the tubing means, extending outwardly therefrom for securing the cant to a roofing surface.
Claim 14
Dependent Claim
60 words
A roofing cant comprising tube means for channeling moisture or gases, perforation means for ingress of moisture or gases to the tube means, venting means for egress of moisture or gases from the tube means, and flexible, impervious sheet means attached to an outer surface of the tubing means, extending outwardly therefrom for securing the cant to a roofing surface.
Claim 15
Dependent Claim
15 words
A roofing cant of claim 12 wherein the flexible sheet means comprises bitumenized roofing membrane.
Claim 16
Dependent Claim
18 words
A roofing cant of claim 12 wherein the flexible sheet means extends outwardly forming sidelaps and a headlap.
References Cited (Backward Citations)
US335577A
Cited
US412313A
Cited
CA615327A
Cited
US2084351A
Cited
US2146775A
Cited
FR1103284A
Cited
US3017722A
Cited
US3332185A
Cited
US3665663A
Cited
US3949657A
Cited
US3984947A
Cited
US4045964A
Cited
US4134268A
Cited
US4223486A
Cited
US4538508A
Cited
US4484424A
Cited
GB2153067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |