Patent US3536610A successfully refreshed from Google Patents.
US3536610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation process
Assignee: Lummus Technology LLC
•
Filing: 1967-12-07
•
Granted: 1970-10-27
•
Expires: 1987-12-07
Abstract
No abstract record available.
Inventors
- 👤 Karl Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:45
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2125325A
Cited
US2113130A
Cited
US2301304A
Cited
US2404677A
Cited
US2487147A
Cited
US2871275A
Cited
US3207692A
Cited
US3368966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |