Patent US3448154A successfully refreshed from Google Patents.
US3448154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamines containing ether oxygen linkages
Assignee: Richardson Co
•
Filing: 1966-04-04
•
Granted: 1969-06-03
•
Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Ronald L Broadhead
- 👤 Frederick D Timmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:08
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/08; C07C211/00; C07C211/01; C07C211/02; C07C211/09; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |