US3251882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epichlorohydrin polyalkylene polyamine polycondensates
Assignee: ChampionX LLC
•
Filing: 1963-01-07
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Granted: 1966-05-17
•
Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:07
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A POLYCONDENSATE HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 OF () EPICHLOROHYDRIN AND (B) A PRECONDENSATE OF A POLYALKYLENE POLYAMINE OF THE FORMULA H2N-(R-NH)2-9H WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE-1,2, AND PROPYLENE-1,3 AND A POLYOXYALKYLENE GLYCOL CHLORIDE HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 100-800, SAID EPICHLOROHYDRIN BEING POLYCONDENSED AT A MOL RATIO OF 1.5-2.0 MOLS OF EPICHLOROHYDRIN PER MOL OF SAID PRECONDENSATE.
Claim 2
Dependent Claim
71 words
A POLYCONDENSATE HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 OF () EPICHLOROHYDRIN AND (B) A PRECONDENSATE OF A POLYALKYLENE POLYAMINE OF THE FORMULA H2N-(R-NH)2-9H WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE-1,2, AND PROPYLENE-1,3 AND A POLYOXYALKYLENE GLYCOL CHLORIDE HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 100-800, SAID EPICHLOROHYDRIN BEING POLYCONDENSED AT A MOL RATIO OF 1.5-2.0 MOLS OF EPICHLOROHYDRIN PER MOL OF SAID PRECONDENSATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |