US3544649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of propylene to isoamylene
Assignee: Phillips Petroleum Co
•
Filing: 1967-11-08
•
Granted: 1970-12-01
•
Expires: 1987-11-08
Abstract
No abstract record available.
Inventors
- 👤 Rolland E Dixon
- 👤 John F Hutto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:51
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/10; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; C07C6/00; C07C6/02; C07C6/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/32; C07C2523/36; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/20; C07C2531/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2881234A
Cited
US3379706A
Cited
US3261879A
Cited
GB1064829A
Cited
US3365513A
Cited
US3457320A
Cited
US3459825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |