US5098782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded ethylenic polymer foam containing both open and closed cells
Assignee: Nomaco Inc
•
Filing: 1991-09-16
•
Granted: 1992-03-24
•
Expires: 2011-09-16
Abstract
Abstract Disclosed is an extruded, low density, non-outgassing ehtylenic polymer foam containing 30-85% open cells and the remainder closed cells and having an essentially integral surface. The foam posseses superior compression recovery and lower compression resistance when compared with similarly comprised ehtylenic closed cell foams and superior moisture resistance and handling characteristics when compared to open cell foams.
Inventors
- 👤 Edward E. Hovis
- 👤 Eric D. Johnson
- 👤 Michael J. Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/34; C08J2323/00; C08J2323/02; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/249991
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
An extruded polymer foam sealant backer rod having a circular cross-section and being adapted to be compressed between and provide a seal between two surfaces, said circular cross-section having a diameter in the range of 3/8 inches-2 inches, said backer rod having a density of from about 1.5 lb/ft 3 to about 10 lb./ft 3 and a compression resistance of 8.5 psi or less at 50% compression, an integral skin covering the foam, said foam containing both closed cells and open cells said open cells being present in a percent sufficient to render the backer rod non-outgassing as determined by ASTM C24.32.13 (Task Group 13) Proposed Test Method for Determining Outgassing.
Claim 2
Dependent Claim
111 words
An extruded polymer foam sealant backer rod having a circular cross-section and being adapted to be compressed between and provide a seal between two surfaces, said circular cross-section having a diameter in the range of 3/8 inches-2 inches, said backer rod having a density of from about 1.5 lb/ft 3 to about 10 lb./ft 3 and a compression resistance of 8.5 psi or less at 50% compression, an integral skin covering the foam, said foam containing both closed cells and open cells said open cells being present in a percent sufficient to render the backer rod non-outgassing as determined by ASTM C24.32.13 (Task Group 13) Proposed Test Method for Determining Outgassing.
Claim 3
Dependent Claim
20 words
The foam sealant backer rod as in claim 1 wherein the compression resistance is in the range of 2-7 psi.
Claim 4
Dependent Claim
20 words
The foam sealant backer rod as in claim 2, wherein the compression resistance is in the range of 3-5 psi.
Claim 5
Dependent Claim
21 words
The foam sealant backer rod as in claim 3 wherein the density is in the range of 2-5 lb/ft 3 .
Claim 6
Dependent Claim
21 words
A foam sealant backer rod as in claim 4 wherein the foam has an open cell content of at least 30%.
Claim 7
Dependent Claim
22 words
A foam sealant backer rod as in claim 1 wherein the foam has a density in the range of 1.5-3.51b./ft 3 .
Claim 8
Dependent Claim
35 words
A foam sealant backer rod as in claim 6 wherein the foam may be compressed from about 25% to about 60% of its relaxed cross-sectional dimension by the two surfaces between which it is inserted.
Claim 9
Dependent Claim
19 words
A foam sealant backer rod as in claim 7 wherein the rod is overlayed with a fluid impervious layer.
Claim 10
Dependent Claim
25 words
A foam sealant backer rod as in claim 3 wherein the foam recovers at least 92% of its diameter after 50% compression for 24 hours.
Claim 11
Dependent Claim
29 words
A foam sealant backer rod as in claim 9 wherein the foam has a density in the range of about 1.5 lbs/ft 3 to about 3.5 lbs/ft 3 .
Claim 12
Dependent Claim
21 words
The foam sealant backer rod as in claim 1 wherein the density is in the range of 2-5 lb/ft 3 .
Claim 13
Dependent Claim
21 words
A foam sealant backer rod as in claim 1 wherein the foam has compression resistance in the range of 3-5 psi.
Claim 14
Dependent Claim
35 words
A foam sealant backer rod as in claim 1 wherein the foam may be compressed from about 25% to about 60% of its relaxed cross-sectional dimension by the two surfaces between which it is inserted.
Claim 15
Dependent Claim
19 words
A foam sealant backer rod as in claim 1 wherein the foam contains a maximum of 85% open cells.
Claim 16
Dependent Claim
25 words
A foam sealant backer rod as in claim 1 wherein the foam recover at least 92% of its diameter after 50% compression for 24 hours.
Claim 17
Dependent Claim
29 words
A foam sealant backer rod as in claim 15 wherein the foam has a density in the range of about 1.5 lbs/ft 3 to about 3.5 lbs/ft 3 .
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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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |