Patent US2473161A successfully refreshed from Google Patents.
US2473161A
Expired / Lapsed
US
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Propane chlorination
Assignee: Purdue Research Foundation
•
Filing: 1945-09-26
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Granted: 1949-06-14
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Expires: 1965-09-26
Abstract
No abstract record available.
Inventors
- 👤 Earl T Mcbee
- 👤 Lawrence W Devaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379367A
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US1248065A
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US1523563A
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US1954438A
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US2174737A
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US2200255A
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US2377669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |