US3470248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic polyamines
Assignee: Union Carbide Corp
•
Filing: 1965-10-19
•
Granted: 1969-09-30
•
Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Brotherton
- 👤 Robert J Knopf
- 👤 Paul S Starcher
- 👤 Charles A Noffsinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C07; C07C; C07C45/00; C07C45/49; C07C45/50; C07C47/00; C07C47/28; C07C47/34; C07C47/347; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5026; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3148202A
Cited
US3317387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |