US3489208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction column
Assignee: Evonik Operations GmbH
•
Filing: 1968-02-16
•
Granted: 1970-01-13
•
Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Rolf Manteufel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4313; B01F25/4315; B01F25/4319; B01F25/432; B01F25/4323; B01J; B01J19/00; B01J19/30; F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/085; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30226; B01J2219/3023; B01J2219/304; B01J2219/30408; B01J2219/30433; B01J2219/30466; B01J2219/308; B01J2219/3081; B01J2219/3085; B01J35/00; B01J35/50; B01J35/56; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/449; Y10S261/00; Y10S261/72
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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |