US2561528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsation chamber
Assignee: Phillips Petroleum Co
•
Filing: 1947-04-07
•
Granted: 1951-07-24
•
Expires: 1967-04-07
Abstract
No abstract record available.
Inventors
- 👤 Charles O Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US412547A
Cited
US561992A
Cited
US1216761A
Cited
US1938167A
Cited
CH158616A
Cited
US2315179A
Cited
US2341501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |