Patent US2839428A successfully refreshed from Google Patents.
US2839428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting oxidation of tin-plate
Assignee: United States Steel Corp
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Filing: 1956-04-26
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Granted: 1958-06-17
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Aner N Laubscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:51
CPC Classifications
C; C23; C23F; C23F15/00; C23C; C23C22/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF INHIBITING OXIDATION OF A TIN SURFACE COMPRISING APPLYING THERETO A COATING OF A LIQUID POLYMER OF POLYALKYLENE GLYCOLS HAVING A VISCOSITY OF LESS THAN 500 CENTIPOISES AT 25*C., A VAPOR PRESSURE LESS THAN 10 MM. OF MERCURY AT 227*C., A MOLECULAR WEIGHT OF ABOUT 625 AND EFFECTIVE TO IMPART TO SAID SURFACE A COEFFICIENT OF FRICTION LESS THAN ABOUT .3.
Claim 2
Independent Claim
63 words
A METHOD OF INHIBITING OXIDATION OF A TIN SURFACE COMPRISING APPLYING THERETO A COATING OF A LIQUID POLYMER OF POLYALKYLENE GLYCOLS HAVING A VISCOSITY OF LESS THAN 500 CENTIPOISES AT 25*C., A VAPOR PRESSURE LESS THAN 10 MM. OF MERCURY AT 227*C., A MOLECULAR WEIGHT OF ABOUT 625 AND EFFECTIVE TO IMPART TO SAID SURFACE A COEFFICIENT OF FRICTION LESS THAN ABOUT .3.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |