US3226817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous method for fabricating tubing
Assignee: INTERNAT NIKOH CORP
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Filing: 1963-04-17
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Granted: 1966-01-04
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Expires: 1983-04-17
Abstract
No abstract record available.
Inventors
- 👤 Edward J Simborg
- 👤 John A Henricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:02
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; B21C37/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49829; Y10T29/49888; Y10T29/53; Y10T29/53313; Y10T29/53348; Y10T29/53357
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
THE METHOD OF CONTINUOUSLY FABRICATING GALVANIZED STEEL TUBING WHICH COMPRISES THE STEPS OF: INTERCONNECTING THE LEADING EDGE OF ONE END OF A FLAT STEEL STOCK WITH THE TRAILING EDGE OF ONE END OF ANOTHER FLAT STEEL STOCK BY PASSAGE OF THE LATTER THROUGH A LOOPING STORAGE SYSTEM; CHEMICALLY CLEANING AND DEGREASING THE STEEL STOCK WITH A SYNTHETIC DETERGENT SYSTEM COMPRISING A BORAX AND POLYPHOSPHATE BASE; FORMING THE CONTINUOUS LENGTH OF FLAT STOCK THUS PRODUCED INTO A TUBULAR CONFIGURATION; WELDING THE ABUTTING EDGES OF THE TUBULAR CONFIGURATION INTO A LONGITUDINAL SEAM OF FORMED TUBING; CLEANING AND FLUXING THE EXTERIOR SURFACE OF THE FORMED TUBING, THE SAID CLEANING INCLUDING THE STEP OF ABRASIVE IMPACTION OF THE TUBING; PREHEATING THE FORMED TUBING TO A RANGE OF FROM 500* F. TO 800*F. BY PASSAGE THEREOF INTERIORLY OF AN ELECTRICALLY INSULATED INDUCTION HEATING COIL; APPLYING A PREDETERMINED THICKNESS OF MOLTEN ZINC TO THE FORMED TUBING BY PASSAGE OF THE TUBING THROUGH A PREDETERMINED LEVEL OF MOLTEN ZINC CONTAINING 0.2% TO 0.3% ALUMINUM AND BY REMOVING EXCESS MOLTEN ZINC FROM THE COATED TUBING BY COUNTERCURRENT GASEOUS BLASTS; COOLING THE COATED TUBING; FORMING A PROTECTIVE ZINC CHROMATE FINISH ON THE COATED TUBING; AND SIZING THE COATED TUBING.
Claim 2
Independent Claim
200 words
THE METHOD OF CONTINUOUSLY FABRICATING GALVANIZED STEEL TUBING WHICH COMPRISES THE STEPS OF: INTERCONNECTING THE LEADING EDGE OF ONE END OF A FLAT STEEL STOCK WITH THE TRAILING EDGE OF ONE END OF ANOTHER FLAT STEEL STOCK BY PASSAGE OF THE LATTER THROUGH A LOOPING STORAGE SYSTEM; CHEMICALLY CLEANING AND DEGREASING THE STEEL STOCK WITH A SYNTHETIC DETERGENT SYSTEM COMPRISING A BORAX AND POLYPHOSPHATE BASE; FORMING THE CONTINUOUS LENGTH OF FLAT STOCK THUS PRODUCED INTO A TUBULAR CONFIGURATION; WELDING THE ABUTTING EDGES OF THE TUBULAR CONFIGURATION INTO A LONGITUDINAL SEAM OF FORMED TUBING; CLEANING AND FLUXING THE EXTERIOR SURFACE OF THE FORMED TUBING, THE SAID CLEANING INCLUDING THE STEP OF ABRASIVE IMPACTION OF THE TUBING; PREHEATING THE FORMED TUBING TO A RANGE OF FROM 500* F. TO 800*F. BY PASSAGE THEREOF INTERIORLY OF AN ELECTRICALLY INSULATED INDUCTION HEATING COIL; APPLYING A PREDETERMINED THICKNESS OF MOLTEN ZINC TO THE FORMED TUBING BY PASSAGE OF THE TUBING THROUGH A PREDETERMINED LEVEL OF MOLTEN ZINC CONTAINING 0.2% TO 0.3% ALUMINUM AND BY REMOVING EXCESS MOLTEN ZINC FROM THE COATED TUBING BY COUNTERCURRENT GASEOUS BLASTS; COOLING THE COATED TUBING; FORMING A PROTECTIVE ZINC CHROMATE FINISH ON THE COATED TUBING; AND SIZING THE COATED TUBING.
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |