Patent US3472630A successfully refreshed from Google Patents.
US3472630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination of apparatus elements for production and recovery of distillable aromatic acid
Assignee: Standard Oil Co
•
Filing: 1965-12-27
•
Granted: 1969-10-14
•
Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Richard H Baldwin
- 👤 Nathan Fragen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J19/0053; B01J19/006; B01J19/0066; C07C51/42; C07C51/43; C07C51/44; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00101; B01J2219/00103; B01J2219/00159; B01J2219/00162; B01J2219/00164; B01J2219/00761; B01J2219/00763; B01J2219/00765; B01J2219/00777
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2134571A
Cited
US2720447A
Cited
US2788367A
Cited
US2712550A
Cited
US2871108A
Cited
US2964559A
Cited
US2963509A
Cited
US3281214A
Cited
US3053643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |