US3689311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for external coating of cylindrical objects
Assignee: Ler-Son Co Inc
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Filing: 1970-11-06
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Granted: 1972-09-05
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Expires: 1990-11-06
Abstract
Abstract AN IMPROVED METHOD AND APPARATUS FOR THE EXTERNAL COATING OF CYLINDRICAL OBJECTS IN SUCH A MANNER TO ACCOMPLISH THE ENTIRE PROCESS INCLUDING HEATING AND SURFACE PREPARATION, COATING APPLICATION, CURING, QUENCHING AND INSPECTION IN ONE CONTINUOUS OPERATION WITHOUT INTERRUPTION OF THE TOTAL PROCESS, INCLUDING THE COUPLING OF THE OBJECTS TO BE COATED AND TO PASS SAID COUPLED OBJECTS AS ONE CONTINUOUS ENTITY THROUGH THE ENTIRE PROCESS, WITH THE PROVISION FOR ROTATING THE SAID OBJECTS AROUND THEIR LONGITUDINAL AXIS IN A MANNER SO AS TO OBTAIN THE MOST EFFECTIVE CLEANING AND HEATING AND TO PROVIDE A FINAL COATING WHICH IS EVEN, WITH A MINIMUM OF PINHOLES AND VOIDS.
Inventors
- 👤 Robert W Loeffler
- 👤 Walter W Loeffler Jr
- 👤 Edward L Stubbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:57
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/146; B05D1/00; B05D1/002; B05D3/00; B05D3/02; B05D3/0218; Y; Y10; Y10S; Y10S118/00; Y10S118/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |