US4451171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide as a primer for use with asphaltic membranes
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1982-05-10
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Granted: 1984-05-29
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Expires: 2002-05-10
Abstract
Abstract Polyamide resins are used as primer for highway repairs using asphaltic membranes.
Inventors
- 👤 William E. Uffner
- 👤 Robert N. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:03
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
In a repaired cementitious road comprising a road substrate having a crack therein containing a crack filling material, a primer disposed on opposite surfaces of said road substrate adjacent said crack and an asphaltic membrane spanning said crack and being in contact with said primer on said opposite surfaces, the improvement wherein said primer is a polyamide having a softening point between about 99° C. to about 125° C. and a viscosity at 160° C. of about 6 to about 34 poise.
Claim 2
Dependent Claim
82 words
In a repaired cementitious road comprising a road substrate having a crack therein containing a crack filling material, a primer disposed on opposite surfaces of said road substrate adjacent said crack and an asphaltic membrane spanning said crack and being in contact with said primer on said opposite surfaces, the improvement wherein said primer is a polyamide having a softening point between about 99° C. to about 125° C. and a viscosity at 160° C. of about 6 to about 34 poise.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |