US3554989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified halogen containing polymers
Assignee: Stauffer Chemical Co
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Filing: 1968-11-29
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Granted: 1971-01-12
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Expires: 1988-11-29
Abstract
Abstract A NOVEL MODIFIED POLYMER IS PRODUCED THROUGH THE REACTION OF A THIO ACID OR THIO ANHYDRIDE AND A CHLORINE CONTAINING POLYMER. THE THIO MODIFYING AGENT IS EMPLOYED IN AMOUNTS IN EXCESS OF 10% AND THE REACTION IS CONDUCTED AT TEMPERATURES IN EXCESS OF THE TEMPERATURE AT WHICH HYDROGEN HALIDE IS FORMED FROM THE POLYMER.
Inventors
- 👤 Walter Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:59
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |