US4529660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liner material and method
Assignee: PRECISION PUNCH & PLASTICS Co A CORP OF
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Filing: 1981-05-11
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Granted: 1985-07-16
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Expires: 2001-05-11
Abstract
Abstract A laminated material and method, a liner using the material, and several methods of manufacturing the material.
Inventors
- 👤 Robert J. Heim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/40; B32B7/00; B32B7/04; B32B7/12; B65; B65G; B65G11/00; B65G11/16; B65G11/166; B32B2307/00; B32B2307/50; B32B2307/554; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A liner for use in magnetically permeable conduits used for transporting abrasive materials for preventing damage to said magnetically permeable material which comprises an outer layer of flexible, plastic impregnated with a magnetic material for self-attachment to said magnetically permeable material and an inner layer of a tough, flexible, abrasive-resistant cast urethane material secured to substantially an entire surface of said plastic magnetic material.
Claim 2
Dependent Claim
64 words
A liner for use in magnetically permeable conduits used for transporting abrasive materials for preventing damage to said magnetically permeable material which comprises an outer layer of flexible, plastic impregnated with a magnetic material for self-attachment to said magnetically permeable material and an inner layer of a tough, flexible, abrasive-resistant cast urethane material secured to substantially an entire surface of said plastic magnetic material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |