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US2420883A
Expired / Lapsed
US
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Process for the production of toluene
Assignee: Shell Development Co
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Filing: 1942-11-03
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Granted: 1947-05-20
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Expires: 1962-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ava J Johnson
- 👤 Jr Mott Souders
- 👤 John E Marsland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G2400/00; C10G2400/30
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) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |