Patent US3679593A successfully refreshed from Google Patents.
US3679593A
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US
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Stripping of condensation polymers with an alkoxide
Assignee: Wasatch Chemical Co
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Filing: 1969-01-24
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Granted: 1972-07-25
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Expires: 1989-01-24
Abstract
Abstract METHODS AND COMPOSITIONS FOR STRIPPING OR REMOVING CONDENSATION POLYMERS FROM A SUBSTRATE, WHEREBY THE AMIDE OR ESTER LINKAGES OF SAID POLYMERS ARE CLEAVED BY A TRANSESTERIFICATION REACTION USING AN ALCOHOLIC SOLUTION OF AN ALKALI METAL CATALYST.
Inventors
- 👤 Charles N Hansen
- 👤 Morris D Young
- 👤 James E Granger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:37
CPC Classifications
C; C09; C09D; C09D9/00
Claims Analysis
Total Claims: 0
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |