US2867241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamination of thermoplastic polymers
Assignee: 3M Co
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Filing: 1956-05-07
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Granted: 1959-01-06
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Leo J Fitzharris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B27/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A NOVEL PIPE WHICH COMPRISES AN INNER PROTECTIVE LAYER OF A THERMOPLASTIC OLEFIN POLYMER FILM, AN OUTER SUPPORTING LAYER OF A SETTABLE MATERIAL AND INTERPOSED BETWEEN SAID INNER PROTECTIVE LAYER AND SAID OUTER SUPPORTING LAYER, A PLURALITY OF THERMOPLASTIC OLEFIN POLYMER PARTICLES, SAID PARTICLES BEING FUSED TO A SURFACE OF SAID PROTECTIVE LAYER, AND EMBEDDED IN A SURFACE OF SAID SUPPORTING LAYER.
Claim 2
Dependent Claim
62 words
A NOVEL PIPE WHICH COMPRISES AN INNER PROTECTIVE LAYER OF A THERMOPLASTIC OLEFIN POLYMER FILM, AN OUTER SUPPORTING LAYER OF A SETTABLE MATERIAL AND INTERPOSED BETWEEN SAID INNER PROTECTIVE LAYER AND SAID OUTER SUPPORTING LAYER, A PLURALITY OF THERMOPLASTIC OLEFIN POLYMER PARTICLES, SAID PARTICLES BEING FUSED TO A SURFACE OF SAID PROTECTIVE LAYER, AND EMBEDDED IN A SURFACE OF SAID SUPPORTING LAYER.
Claim 3
Dependent Claim
62 words
A PROCESS FOR FABRICATING A PLASTIC LINED PIPE WHICH COMPRISES PROVIDING AN INNER PROTECTIVE LAYER OF A THERMOPLASTIC OLEFIN POLYMER IN TUBULAR FORM, FUSING PARTICLES OF A THERMOPLASTIC OLEFIN POLYMER TO THE OUTER SURFACE OF SAID TUBULAR THERMOPLASTIC OLEFIN POLYMER, APPLYING A SETTABLE MATERIAL TO THE OUTER SURFACE OF SAID TUBULAR THERMOPLASTIC OLEFIN POLYMER AND EMBEDDING SAID PARTICLES IN SAID SETTABLE MATERIAL.
Claim 4
Dependent Claim
62 words
A PROCESS FOR FABRICATING A PLASTIC LINED PIPE WHICH COMPRISES PROVIDING AN INNER PROTECTIVE LAYER OF A THERMOPLASTIC OLEFIN POLYMER IN TUBULAR FORM, FUSING PARTICLES OF A THERMOPLASTIC OLEFIN POLYMER TO THE OUTER SURFACE OF SAID TUBULAR THERMOPLASTIC OLEFIN POLYMER, APPLYING A SETTABLE MATERIAL TO THE OUTER SURFACE OF SAID TUBULAR THERMOPLASTIC OLEFIN POLYMER AND EMBEDDING SAID PARTICLES IN SAID SETTABLE 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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |