Patent US2717843A successfully refreshed from Google Patents.
US2717843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet for protection of metals from corrosion and method of making
Assignee: Shell Development Co
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Filing: 1952-07-07
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Granted: 1955-09-13
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Expires: 1972-07-07
Abstract
No abstract record available.
Inventors
- 👤 Wachter Aaron
- 👤 Stillman Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF PREPARING A SUBSTANTIALLY SOLID COMPOSITION CAPABLE OF INHIBITING METAL CORROSION ON THE PRESENCE OF MOISTURE AND AIR, WHICH METHOD COMPRISES COATING A PAPER WITH A SUSPENSION OBTAINED BY MIXING WATER, A DICYCLOHEXYLAMINE, PHOSPHATE AND SODIUM NITRITE IN THE PRESENCE OF ADHESIVE CASEIN USED IN AN AMOUNT SUFFICIENT TO BIND THE RESULTANT MIXTURE TO SAID PAPER, THE AMOUNTS OF SAID PHOSPHATE AND SAID NITRITE BEING SUFFICIENT TO FORM, BY IONIC INTERCHARGE, BETWEEN ABOUT 0.05 GRAM AND ABOUT 5.0 GRAMS OF DICYCLOHEXYLAMINE NITRITE PER EACH SQUARE FOOT OF PAPER SURFACE THUS COATED, AND DRYING THE COATED PAPER, SAID SOLID COMPOSITION, WHEN IN CONTACT WITH WATER, RESULTING IN A LIQUID PHASE HAVING A PH VALUE OF AT LEAST ABOUT 6.
Claim 2
Independent Claim
120 words
THE METHOD OF PREPARING A SUBSTANTIALLY SOLID COMPOSITION CAPABLE OF INHIBITING METAL CORROSION ON THE PRESENCE OF MOISTURE AND AIR, WHICH METHOD COMPRISES COATING A PAPER WITH A SUSPENSION OBTAINED BY MIXING WATER, A DICYCLOHEXYLAMINE, PHOSPHATE AND SODIUM NITRITE IN THE PRESENCE OF ADHESIVE CASEIN USED IN AN AMOUNT SUFFICIENT TO BIND THE RESULTANT MIXTURE TO SAID PAPER, THE AMOUNTS OF SAID PHOSPHATE AND SAID NITRITE BEING SUFFICIENT TO FORM, BY IONIC INTERCHARGE, BETWEEN ABOUT 0.05 GRAM AND ABOUT 5.0 GRAMS OF DICYCLOHEXYLAMINE NITRITE PER EACH SQUARE FOOT OF PAPER SURFACE THUS COATED, AND DRYING THE COATED PAPER, SAID SOLID COMPOSITION, WHEN IN CONTACT WITH WATER, RESULTING IN A LIQUID PHASE HAVING A PH VALUE OF AT LEAST ABOUT 6.
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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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |