Patent US2450174A successfully refreshed from Google Patents.
US2450174A
Expired / Lapsed
US
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Assignee: Gulf Research and Development Co
•
Filing: 1945-01-11
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Granted: 1948-09-28
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Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 William W Weinrich
- 👤 Jr Clark A Holloway
- 👤 William S Bonnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:49
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/60; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1964560A
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US2000038A
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US2034989A
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US2170306A
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US2305026A
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US2317241A
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US2377935A
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US2373062A
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US2377657A
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US2366117A
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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) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |