US3372129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing polyamines
Assignee: ChampionX LLC
•
Filing: 1964-10-06
•
Granted: 1968-03-05
•
Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2040061A
Cited
US2268620A
Cited
US2279294A
Cited
US2995512A
Cited
US2769841A
Cited
US2765229A
Cited
US2834675A
Cited
US3219578A
Cited
US3251778A
Cited
US3203910A
Cited
US3215625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |