US3553178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon dioxide as an ethylene polymer coagulant
Assignee: Gulf Research and Development Co
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Filing: 1967-09-07
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Granted: 1971-01-05
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Expires: 1987-09-07
Abstract
Abstract WATER-INSOLUBLE, SELF-EMULSIFIABLE ETHYLENE POLYMERS CONTAINING PENDENT CARBOXYLATE SALT GROUPS ARE RECOVERED FROM AQUEOUS DISPERSIONS OF SUCH POLYMERS BY CONTACTING SUCH DISPERSIONS WITH CARBON DIOXIDE.
Inventors
- 👤 Bert H Clampitt
- 👤 Rajindar K Kochhar
- 👤 Robert K Bartholomew
- 👤 Harold L Burrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |