Patent US2425559A successfully refreshed from Google Patents.
US2425559A
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Catalytic conversion of alkyl aromatic hydrocarbons
Assignee: MW Kellogg Co
•
Filing: 1943-03-11
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Granted: 1947-08-12
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Expires: 1963-03-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Passino
- 👤 Henry G Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:32
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; C07C5/274; C07C5/2748; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB292933A
Cited
GB292932A
Cited
US1953702A
Cited
US2143472A
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US2222128A
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US2243873A
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US2241393A
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US2304183A
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US2282231A
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US2337190A
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US2338711A
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US2343744A
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US2315078A
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US2347317A
Cited
US2325379A
Cited
US2378763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |