Patent US3778476A successfully refreshed from Google Patents.
US3778476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric organic halogen salts
Assignee: California Institute of Technology
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Filing: 1970-05-11
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Granted: 1973-12-11
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Expires: 1990-05-11
Abstract
Abstract HALOGEN CONTAINING POLYMER SALTS FORMED FRO THE REACTION OF LINEAR POLYMERS CONTAINING QUATERNIZABLE NITROGENTS DISSOLVED IN A SUITABLE SOLVENT, WITH A HALOGEN SOURCE UNDER CONDITIONS SUFFICIENT TO PRECIPITATE THE HALOGEN CONTAINING POLYMER SALTS FROM THE SOLUTION.
Inventors
- 👤 H Keyzer
- 👤 A Rembaum
- 👤 R Landel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:02
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; D; D06; D06M; D06M16/00
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |