US3438744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sulphonating and/or sulphating organic compounds controlling the sulphonation or sulphation degree according to the conductivity of the reaction mixture
Assignee: Mo och Domsjo AB
•
Filing: 1965-02-01
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Granted: 1969-04-15
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Olof Steijner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; C; C07; C07C; C07C303/00; C07C303/24; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00162; B01J2219/00164; B01J2219/00168; B01J2219/0018; B01J2219/18; B01J2219/185; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 0
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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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |