Patent US2694658A successfully refreshed from Google Patents.
US2694658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal stripping process
Assignee: Stepan Co
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Filing: 1953-09-03
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Granted: 1954-11-16
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Expires: 1973-09-03
Abstract
No abstract record available.
Inventors
- 👤 Wilfred J Crepeau
- 👤 Jr Vincent A Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A METHOD OF STRIPPING A POLYVINYL ALKANAL RESIN COATING FROM A METAL ARTICLE, WHICH COMPRISES TREATING THE COATED ARTICLE WITH DIMETHYL SULFOXIDE UNTIL THE RESIN HAS SOFTENED AND SWELLED, AND THEN SEPARATING THE SOFTENED SWOLLEN RESIN FROM THE ARTICLE.
Claim 2
Independent Claim
39 words
A METHOD OF STRIPPING A POLYVINYL ALKANAL RESIN COATING FROM A METAL ARTICLE, WHICH COMPRISES TREATING THE COATED ARTICLE WITH DIMETHYL SULFOXIDE UNTIL THE RESIN HAS SOFTENED AND SWELLED, AND THEN SEPARATING THE SOFTENED SWOLLEN RESIN FROM THE ARTICLE.
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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |