US2884351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cold rolling ferrous strip stock
Assignee: Parker Rust Proof Co
•
Filing: 1956-01-25
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Granted: 1959-04-28
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Expires: 1976-01-25
Abstract
No abstract record available.
Inventors
- 👤 Walter R Cavanagh
- 👤 Robert C Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/22; B; B21; B21B; B21B1/00; B21B1/22; C23C22/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR TREATING CONTINUOUS FERROUS STRIP STOCK WHICH COMPRISES THE STEPS OF PICKLING THE STRIP, CONTACTING THE SAID PICKLED STRIP WHILE THE SAME IS MOVING WITH AN AQUEOUS ACIDIC ZINC PHOSPHATE COATING SOLUTION COMPRISING AS THE ESSENTIAL COATING PRODUCING INGREDIENTS ZINC IN AN AMOUNT IN THE RANGE OF 0.05%-1.5% BY WEIGHT, 0.4 TO ABOUT 2.5% PO4 AND AN OXIDIZING AGENT OTHER THAN CHLORATE IN AN AMOUNT SUFFICIENT TO PRODUCE A COATING WEIGHT OF AT LEAST 50 MG. PER SQUARE FOOT IN NOT MORE THAN 10 SECONDS, AND REGULATING THE TIME OF CONTACT OF SAID PICKLED STRIP WITH SAID SOLUTION SO AS TO PRODUCE A COATING WHICH HAS A WEIGHT IN THE RANGE OF ABOUT 50 MG./ SQ. FT TO ABOUT 1000 MG./SQ.FT. AND WHICH VARIES FROM THE AVERAGE COATING WEIGHT PREVALENT ON SAID STRIP BY NOT MORE THAN ABOUT 200 MG./SQ.FT.
Claim 2
Independent Claim
142 words
A METHOD FOR TREATING CONTINUOUS FERROUS STRIP STOCK WHICH COMPRISES THE STEPS OF PICKLING THE STRIP, CONTACTING THE SAID PICKLED STRIP WHILE THE SAME IS MOVING WITH AN AQUEOUS ACIDIC ZINC PHOSPHATE COATING SOLUTION COMPRISING AS THE ESSENTIAL COATING PRODUCING INGREDIENTS ZINC IN AN AMOUNT IN THE RANGE OF 0.05%-1.5% BY WEIGHT, 0.4 TO ABOUT 2.5% PO4 AND AN OXIDIZING AGENT OTHER THAN CHLORATE IN AN AMOUNT SUFFICIENT TO PRODUCE A COATING WEIGHT OF AT LEAST 50 MG. PER SQUARE FOOT IN NOT MORE THAN 10 SECONDS, AND REGULATING THE TIME OF CONTACT OF SAID PICKLED STRIP WITH SAID SOLUTION SO AS TO PRODUCE A COATING WHICH HAS A WEIGHT IN THE RANGE OF ABOUT 50 MG./ SQ. FT TO ABOUT 1000 MG./SQ.FT. AND WHICH VARIES FROM THE AVERAGE COATING WEIGHT PREVALENT ON SAID STRIP BY NOT MORE THAN ABOUT 200 MG./SQ.FT.
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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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |