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US2437290A
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Method for manufacturing anhydrous hci
Assignee: Phillips Petroleum Co
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Filing: 1943-08-09
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Granted: 1948-03-09
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Expires: 1963-08-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Bottenberg
- 👤 James A Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US961530A
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US1458309A
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US1930592A
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US2227953A
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US2257533A
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US2254788A
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US2332493A
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US2355857A
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US2351461A
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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) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |