Patent US3501545A successfully refreshed from Google Patents.
US3501545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering the aromatic value of sulfur-containing still bottoms formed during the refining of styrene
Assignee: Union Carbide Corp
•
Filing: 1968-12-27
•
Granted: 1970-03-17
•
Expires: 1988-12-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph Peter Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:51
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005; C07C7/148; C07C7/163
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2913397A
Cited
US3293308A
Cited
US3193594A
Cited
US3168583A
Cited
US3268608A
Cited
US3344201A
Cited
US3395095A
Cited
US3367861A
Cited
US3408264A
Cited
US3408265A
Cited
US3408263A
Cited
US3426091A
Cited
US3399063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |