US2644774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfide coating
Assignee: Parker Rust Proof Co
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Filing: 1952-04-18
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Granted: 1953-07-07
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Expires: 1972-04-18
Abstract
No abstract record available.
Inventors
- 👤 John E Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/48; C23C22/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A COMPOSITION FOR FORMING A SULFIDE COATING ON A STEEL SURFACE WHICH CONSISTS ESSENTIALLY OF A MEMBER OF THE GROUP CONSISTING OF THE SULFIDE ION AND IONS WHICH FORM THE SULFIDE ION THROUGH REDUCTION ON THE STEEL SURFACE AND IN A PROPORTION EQUIVALENT TO ABOUT .3 TO 1.3% SULFITE ION, THE THIOCYANATE ION IN A PROPORTION OF FROM .05% UP TO AND INCLUDING SATURATION, AND AN ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC, HYDROCHLORIC AND NITRIC IN A PROPORTION SUFFICIENT TO PROVIDE A PH IN THE RANGE OF ABOUT .3 TO 1.1.
Claim 2
Dependent Claim
93 words
A COMPOSITION FOR FORMING A SULFIDE COATING ON A STEEL SURFACE WHICH CONSISTS ESSENTIALLY OF A MEMBER OF THE GROUP CONSISTING OF THE SULFIDE ION AND IONS WHICH FORM THE SULFIDE ION THROUGH REDUCTION ON THE STEEL SURFACE AND IN A PROPORTION EQUIVALENT TO ABOUT .3 TO 1.3% SULFITE ION, THE THIOCYANATE ION IN A PROPORTION OF FROM .05% UP TO AND INCLUDING SATURATION, AND AN ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC, HYDROCHLORIC AND NITRIC IN A PROPORTION SUFFICIENT TO PROVIDE A PH IN THE RANGE OF ABOUT .3 TO 1.1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |