Patent US3432326A successfully refreshed from Google Patents.
US3432326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating pipe
Assignee: Dow Chemical Co
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Filing: 1965-09-23
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Granted: 1969-03-11
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Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Jerome H Lemelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:37
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/22; B05D1/24; B05D7/00; B05D7/22; B05D7/222; B22; B22C; B22C9/00; B22C9/06; F; F28; F28F; F28F13/00; F28F13/18; F28F19/00; F28F19/02; F28F3/00; F28F3/12; F28F3/14; B05D2202/00; B05D2401/00; B05D2401/30; B05D2401/32; B05D2507/00; B05D2507/01; B05D3/00; B05D3/02; B05D3/0218; B05D3/0245; B05D3/0254; B05D3/0281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
METHOD FOR SURFACE COATING METAL OBJECTS WHICH COMPRISES FORMING A FLUIDIZABLE MASS OF FINELY DIVIDED SOLID PARTICLES OF A FUSIBLE ORGANIC RESINOUS COATING MATERIAL, SAID MASS BEING AT LEAST AS DEEP AS THE PORTION OF SAID OBJECT INTENDED TO BE COATED; FLUIDIZING SAID MASS BY PASSING A STREAM OF AN INERT GAS AT A FLUIDIZING RATE UPWARDLY THROUGH SAID MASS WHILE MAINTAINING THE AVERAGE TEMPERATURE OF THE MASS BELOW THE SOFTENING TEMPERATURE OF THE SOLID PARTICLES THEREIN; CONTACTING A METAL OBJECT TO BE COATED WITH SAID FLUIDIZED MASS; INDUCTIVELY HEATING SAID METAL OBJECT WHILE IT IS IN CONTACT WITH SAID FLUIDIZED MASS BY SUBJECTING TIT TO THE INFLUENCE OF AN ALTERNATING HIGH FREQUENCY MAGNETIC FIELD TO GENERATE SUFFICIENT HEAT ON THE SURFACE OF SAID OBJECT TO FUSE CONTACTING AND CONTIGUOUS PARTICLES OF SAID ORGANIC RESSINUOUS MATERIAL AND FORM A COATED, ENVELOPING LAYER OF SAID FUSED PARTICLES ON THE SURFACE OF SAID METAL OBJECT; AND THEN REMOVING SAID COATED OBJECT FROM CONTACT WITH SAID FLUIDIZED MASS AND THE INFLUENCE OF SAID MAGNETIC FILED AND COOLING IT TO A NORMAL TEMPERATURE.
Claim 2
Dependent Claim
179 words
METHOD FOR SURFACE COATING METAL OBJECTS WHICH COMPRISES FORMING A FLUIDIZABLE MASS OF FINELY DIVIDED SOLID PARTICLES OF A FUSIBLE ORGANIC RESINOUS COATING MATERIAL, SAID MASS BEING AT LEAST AS DEEP AS THE PORTION OF SAID OBJECT INTENDED TO BE COATED; FLUIDIZING SAID MASS BY PASSING A STREAM OF AN INERT GAS AT A FLUIDIZING RATE UPWARDLY THROUGH SAID MASS WHILE MAINTAINING THE AVERAGE TEMPERATURE OF THE MASS BELOW THE SOFTENING TEMPERATURE OF THE SOLID PARTICLES THEREIN; CONTACTING A METAL OBJECT TO BE COATED WITH SAID FLUIDIZED MASS; INDUCTIVELY HEATING SAID METAL OBJECT WHILE IT IS IN CONTACT WITH SAID FLUIDIZED MASS BY SUBJECTING TIT TO THE INFLUENCE OF AN ALTERNATING HIGH FREQUENCY MAGNETIC FIELD TO GENERATE SUFFICIENT HEAT ON THE SURFACE OF SAID OBJECT TO FUSE CONTACTING AND CONTIGUOUS PARTICLES OF SAID ORGANIC RESSINUOUS MATERIAL AND FORM A COATED, ENVELOPING LAYER OF SAID FUSED PARTICLES ON THE SURFACE OF SAID METAL OBJECT; AND THEN REMOVING SAID COATED OBJECT FROM CONTACT WITH SAID FLUIDIZED MASS AND THE INFLUENCE OF SAID MAGNETIC FILED AND COOLING IT TO A NORMAL TEMPERATURE.
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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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |