US3698980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of polypropylene fabric wrapping material
Assignee: Allied Products Corp
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Filing: 1970-08-03
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Granted: 1972-10-17
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Expires: 1990-08-03
Abstract
Abstract PAPER, ASPHALT, AND FABRIC OF WOVEN STRANDS OF LONGITUDINALLY ORIENTED POLYPROPYLENE ARE LAMINATED BY A CONTINUOUS METHOD IN SPITE OF THE FACT THAT THE SOFTENING POINT OF POLYPROPYLENE IS BELOW THE LAMINATING TEMPERATURE OF THE ASPHALT. THE RESULTING CARPET WRAP IS MORE DURABLE, CHEAPER, STRONGER AND BETTER LOOKING THAN PAPER-BURLAP LAMINATES USED HERETOFORE, AND YET HAS MUCH LOWER BULK DENSITY.
Inventors
- 👤 William P Addison Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/04; B32B11/06; D; D06; D06N; D06N5/00; B32B11/10; B32B37/00; B32B37/14; B32B37/16; B32B37/20; D21; D21H; D21H17/00; D21H17/61; D21H27/00; D21H27/10; D21H27/30; D21H5/00; B32B2262/00; B32B2262/02; B32B2262/0253; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T428/31819; Y10T428/31823
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |