US3427342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous sulfonation process
Assignee: Chemithon Corp
•
Filing: 1966-11-21
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Granted: 1969-02-11
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Richard J Brooks
- 👤 Burton Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1456; B01D53/1481; B01F; B01F27/00; B01F27/27; B01F27/272; B01J; B01J10/00; B01J10/02; B01J19/00; B01J19/18; B01J19/1862; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/80; C01B17/806; C07; C07B; C07B45/00; C07B45/02; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24; B01F25/00; B01F2025/91; B01F2025/911; B01F27/80; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/00087; B01J2219/00094; B01J2219/00105; B01J2219/0011; B01J2219/0015; B01J2219/00155; B01J2219/00159; B01J2219/00162; B01J2219/00164; B01J2219/00168; B01J2219/00177; B01J2219/18; B01J2219/182; B01J2219/185; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |