Patent US3535339A successfully refreshed from Google Patents.
US3535339A
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US
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Process and apparatus for the continuous reaction of organic compounds with undiluted sulfur trioxide
Assignee: Procter and Gamble Co
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Filing: 1965-12-17
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Granted: 1970-10-20
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Expires: 1985-12-17
Abstract
No abstract record available.
Inventors
- 👤 Harold Henry Beyer
- 👤 Charles Woolsey Motl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/001; B01J4/002; B01J10/00; B01J10/02; B01J19/00; B01J19/24; B01J19/247; C; C07; C07B; C07B45/00; C07B45/02; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2580317A
Cited
US3169142A
Cited
US3270038A
Cited
BE634264A
Cited
GB1007994A
Cited
GB1007995A
Cited
US3232976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |