US4597922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding RF moldable thermoplastic compositions
Assignee: Uniroyal Goodrich Tire Co
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Filing: 1984-05-29
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Granted: 1986-07-01
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Expires: 2004-05-29
Abstract
Abstract A process for the production of moldings from a dry blend of radio frequency susceptible organic polymer particles and rigid inorganic particles wherein the dry blend mixture is poured into a non-radio frequency absorbing mold and scintered using a radio frequency field to form a composite structure.
Inventors
- 👤 Daniel P. Durbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/12; B29C67/00; B29C67/24; B29C67/242; B29C67/243; B29K; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/06; B29K2105/16; B29K2503/00; B29K2503/04; B29K2503/08; B29K2709/00; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S264/911; Y10S264/918; Y10S264/919
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
A process for the production of moldings from a dry blend mixture of between about 5% to 60% by weight of a radio frequency susceptible organic thermoplastic resin and between about 40% and about 95% by weight of a rigid substantially non-radio frequency absorbing inorganic particulate filler wherein said dry blend is poured into a non radio frequency absorbing mold and scintered using a radio frequency field to form a composite structure.
Claim 2
Dependent Claim
72 words
A process for the production of moldings from a dry blend mixture of between about 5% to 60% by weight of a radio frequency susceptible organic thermoplastic resin and between about 40% and about 95% by weight of a rigid substantially non-radio frequency absorbing inorganic particulate filler wherein said dry blend is poured into a non radio frequency absorbing mold and scintered using a radio frequency field to form a composite structure.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the thermoplastic resin component is present at between 5 and 60% by weight of the composite.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the thermoplastic resin component is present at between 5 and 25% by weight of the composite.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the thermoplastic resin is polyvinyl chloride.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the thermoplastic resin component is reground rigid polyvinyl chloride pipe.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein the rigid inorganic particulate material is selected from the group consisting of gravel, sand, mineral wool shot, pearlite, vermiculite and pumice.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the dry blend mixture after being poured into said mold is subjected to pressure.
Claim 9
Dependent Claim
17 words
The process of claim 1 wherein the radio frequency field is a 100 megahertz radio frequency field.
References Cited (Backward Citations)
US2891284A
Cited
US3072960A
Cited
US3207819A
Cited
US3253064A
Cited
US3192291A
Cited
US3586743A
Cited
GB1238881A
Cited
DE2144536A1
Cited
US3806562A
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US3936412A
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FR2305286A1
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US4296053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |