US4617439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heating a substance, for purposes of vulcanization or polymerization
Assignee: Valeo SE
•
Filing: 1985-10-01
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Granted: 1986-10-14
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Expires: 2005-10-01
Abstract
Abstract In a process for heating a substance which is substantially non-conducting electrically, at least one layer of the substance is disposed within a cavity between two plates of a metal which is a good conductor of electricity. Each plate lies in intimate contact with a respective one of the two larger surfaces of the substance. The resulting assembly of the substance and the plates is disposed at a predetermined minimum distance from the walls of the cavity. The substance is then exposed to electromagnetic radiation in the decimeter wavelength band at a predetermined power level and for a predetermined time.
Inventors
- 👤 Christian Lespinats
- 👤 Michel Minet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:24
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; B29C35/0805; B29C2035/0855
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
Process for vulcanizing or polymerizing a non electrically conducting substance comprising the steps of: sandwiching a layer of the substance between and in intimate touching mating relation with two separate plates of a good electrically conductive metal to form an assembly; disposing the assembly in a cavity defined by walls at a positive predetermined minimum spacing from the walls of the cavity; and exposing the assembly to electromagnetic radiation within the decimeter wavelength band at a predetermined power level and for a predetermined time so as to obtain polymerization or vulcanization of the substance.
Claim 2
Dependent Claim
94 words
Process for vulcanizing or polymerizing a non electrically conducting substance comprising the steps of: sandwiching a layer of the substance between and in intimate touching mating relation with two separate plates of a good electrically conductive metal to form an assembly; disposing the assembly in a cavity defined by walls at a positive predetermined minimum spacing from the walls of the cavity; and exposing the assembly to electromagnetic radiation within the decimeter wavelength band at a predetermined power level and for a predetermined time so as to obtain polymerization or vulcanization of the substance.
Claim 3
Dependent Claim
22 words
Process accroding to claim 1, wherein the thickness of the layer of substance is less than half the wavelength of the radiation.
Claim 4
Dependent Claim
57 words
Process according to claim 1, wherein a plurality of the layers of substance are sandwiched between a corresponding plurality of the plates, each of the layers of substance constituting a generally plane panel, and the assembly comprising a stack of panels interleaved between the plates, and being terminated at its top and bottom ends by a plate.
Claim 5
Dependent Claim
13 words
Process according to claim 3, wherein the plates are good conductors of heat.
Claim 6
Dependent Claim
39 words
Process according to claim 3, wherein the plates are of a non-planar shape and by virtue of their profile function to shape the panels upon compressing the stack in a direction normal to the general plane of the panels.
Claim 7
Dependent Claim
24 words
Process according to claim 1, wherein the layer of substance is of generally rectangular shape in plan and comprises at least two tubular sectors.
Claim 8
Dependent Claim
32 words
Process according to claim 1, wherein the minimum predetermined spacing between the assembly and the walls of the cavity is at least one and a half times the wavelength of the radiation.
Claim 9
Dependent Claim
14 words
Process accroding to claim 1, wherein the cavity is defined in a microwave oven.
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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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |