Patent US2098197A successfully refreshed from Google Patents.
Patent US2834691A successfully refreshed from Google Patents.
US2834691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a metal surface for coating and product thereof
Assignee: General Electric Co
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Filing: 1956-10-09
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Granted: 1958-05-13
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Expires: 1976-10-09
Abstract
No abstract record available.
Inventors
- 👤 Jr William Budd Stephenson
- 👤 Greisl Don Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF PREPARNG IRON OR AN IRON BASE METAL ARTICLE TO PRODUCE A BONDING FILM FOR SUBSEQUENT COATING COMPRISING THE STEPS OF: TREATING THE ARTICLE WITH AN AQUEOUS SOLUTION INCLUDING ABOUT 6-9% BY WEIGHT HYDRATED SODIUM SULFATE AND ABOUT 6-11% BY WEIGHT HYDROCHLORIC ACID SOLUTION HAVING A CONCENTRATION OF ABOUT 37% BY WEIGHT OF HYDROGEN CHLORIDE UNTIL A SOFT BONDING FILM IS PRODUCED ON THE SURFACE OF THE ARTICLE, RINSING THE ARTICLE, AND THEN HEATNG THE ARTICLE TO ABOUT 400-440* F. TO CONVERT THE SOFT BONDING FILM TO A HARD AND ADHERENT FORM.
Claim 2
Independent Claim
94 words
A METHOD OF PREPARNG IRON OR AN IRON BASE METAL ARTICLE TO PRODUCE A BONDING FILM FOR SUBSEQUENT COATING COMPRISING THE STEPS OF: TREATING THE ARTICLE WITH AN AQUEOUS SOLUTION INCLUDING ABOUT 6-9% BY WEIGHT HYDRATED SODIUM SULFATE AND ABOUT 6-11% BY WEIGHT HYDROCHLORIC ACID SOLUTION HAVING A CONCENTRATION OF ABOUT 37% BY WEIGHT OF HYDROGEN CHLORIDE UNTIL A SOFT BONDING FILM IS PRODUCED ON THE SURFACE OF THE ARTICLE, RINSING THE ARTICLE, AND THEN HEATNG THE ARTICLE TO ABOUT 400-440* F. TO CONVERT THE SOFT BONDING FILM TO A HARD AND ADHERENT FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |