Patent US3499053A successfully refreshed from Google Patents.
US3499053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-11-10
•
Granted: 1970-03-03
•
Expires: 1985-11-10
Abstract
No abstract record available.
Inventors
- 👤 William J Asher
- 👤 David S Hirshfeld
- 👤 Eli Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C07; C07C; C07C7/00; C07C7/12; C07C7/13
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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |