US2872072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Phillips Petroleum Co
•
Filing: 1955-05-16
•
Granted: 1959-02-03
•
Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/58; B67D7/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2239060A
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US1122605A
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US920089A
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US1969360A
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US2024480A
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US2250326A
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US2612304A
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US2593894A
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US2554296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |