US2876132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating steel tubing
Assignee: Motors Liquidation Co
•
Filing: 1952-07-19
•
Granted: 1959-03-03
•
Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 Donald P Worden
- 👤 Willard H Janneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:59
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
THE CONTINUOUS METHOD OF COATING STEEL TUBING WITH A LAYER OF NON-FERROUS, ANTI-CORROSIVE AND PROTECTIVE METALLIC COATING WHICH COMPRISES SUCCESSIVELY APPLYING TO THE TUBING AS IT IS REMOVED LONGITUDINALLY A RELATIVELY DILUTE SULFURIC ACID BATH CONTAINING APPROXIMATELY 12% AND 25% SULFURIC ACID BY VOLUME THROUGH WHICH DIRECT ELECTRIC CURRENT IS PASSED IN SUCH A MANNER THAT THE TUBING CONSTITUTES AN ANODE, DIRECTING JETS OF WATER OVER THE TUBING AFTER APPLICATION OF THE ACID BATH TO REDUCE THE TEMPERATURE OF THE TUBING AND TO REMOVE ANY EXCESS OF ACID REMAINING ON THE SURFACE THEREOF, THEN APPLYING TO THE MOVING TUBING A FLUX CONSISTING ESSENTIALLY OF APPROXIAMETLY 30% TO 75% BY WEIGHT ZINC CHLORIDE AND THE BALANCE WATER TO FACILATE ADHERENCE OF THE COATING LAYER TO THE TUBING SURFACE, SUBSEQUENTLY APPLYING A LEAD ALLOY COATING TO THE MOVING TUBING WHILE MAINTAINING THE LEAD ALLOY AT A TEMPERATURE ABOVE ITS MELTING POINT, DIRECTING COOLING WATER OVER THE SURFACE OF THE TUBING AFTER APPLICATION OF THE COATING LAYER THEREOF IN ORDER TO COOL THE TUBING AND SOLIDIFY THE COATING MATERIAL ON THE TUBING SURFACE.
Claim 2
Dependent Claim
180 words
THE CONTINUOUS METHOD OF COATING STEEL TUBING WITH A LAYER OF NON-FERROUS, ANTI-CORROSIVE AND PROTECTIVE METALLIC COATING WHICH COMPRISES SUCCESSIVELY APPLYING TO THE TUBING AS IT IS REMOVED LONGITUDINALLY A RELATIVELY DILUTE SULFURIC ACID BATH CONTAINING APPROXIMATELY 12% AND 25% SULFURIC ACID BY VOLUME THROUGH WHICH DIRECT ELECTRIC CURRENT IS PASSED IN SUCH A MANNER THAT THE TUBING CONSTITUTES AN ANODE, DIRECTING JETS OF WATER OVER THE TUBING AFTER APPLICATION OF THE ACID BATH TO REDUCE THE TEMPERATURE OF THE TUBING AND TO REMOVE ANY EXCESS OF ACID REMAINING ON THE SURFACE THEREOF, THEN APPLYING TO THE MOVING TUBING A FLUX CONSISTING ESSENTIALLY OF APPROXIAMETLY 30% TO 75% BY WEIGHT ZINC CHLORIDE AND THE BALANCE WATER TO FACILATE ADHERENCE OF THE COATING LAYER TO THE TUBING SURFACE, SUBSEQUENTLY APPLYING A LEAD ALLOY COATING TO THE MOVING TUBING WHILE MAINTAINING THE LEAD ALLOY AT A TEMPERATURE ABOVE ITS MELTING POINT, DIRECTING COOLING WATER OVER THE SURFACE OF THE TUBING AFTER APPLICATION OF THE COATING LAYER THEREOF IN ORDER TO COOL THE TUBING AND SOLIDIFY THE COATING MATERIAL ON THE TUBING SURFACE.
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |