Patent US2662837A successfully refreshed from Google Patents.
US2662837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for removing hardened silicone resin glazes from metal surfaces
Assignee: Detrex Corp
•
Filing: 1949-02-19
•
Granted: 1953-12-15
•
Expires: 1969-02-19
Abstract
No abstract record available.
Inventors
- 👤 Ira J Dunean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
THE METHOD OF REMOVING HARDENED SILICONE RESIN GLAZE FROM A METAL BASE HAVING A SURFACE CONTAINING TIN WITHOUT CAUSING APPRECIALE TIN ATTACK, COMPRISING CONTACTING THE RESIN WITH A COMPOSITION CONSISTING ESSENTIALLY BY WEIGHT OF ABOUT .02-5% SODIUM HYDROXIDE AND 1-97% PERCHLORETHYLENE IN THE BALANCE OF ETHYLENE GLYCOL MONOMETHYL ETHER, MAINTAINING SAID COMPOSITION AT ABOUT 55-75* C. FOR A PERIOD SUFFICIENT TO MODIFY THE HARDENED SILICONE RESIN GLAZE, REMOVING THE BASE AND GLAZE FROM SAID COMPOSITION, CONTACTING THE MODIFIED RESIN WITH WATER, AND REMOVING THE RESULTING MATERIAL FROM SAID BASE.
References Cited (Backward Citations)
GB190205541A
Cited
US1501086A
Cited
US2206776A
Cited
US2212761A
Cited
US2445064A
Cited
US2432665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |