US2943641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for attenuating pulsative flow in gases
Assignee: Richfield Oil Corp
•
Filing: 1956-01-30
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Granted: 1960-07-05
•
Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Marion L Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:08
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0055; F16; F16L; F16L55/00; F16L55/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2184891A
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US2437446A
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US2501751A
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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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |