US2843147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure system including a vibrating throttling valve
Assignee: Shell Development Co
•
Filing: 1952-09-22
•
Granted: 1958-07-15
•
Expires: 1972-09-22
Abstract
No abstract record available.
Inventors
- 👤 Penther Carl Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0682; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US928043A
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US2207921A
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US2428269A
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US2405761A
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US2433205A
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US2501583A
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US2527136A
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US2635138A
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US2609965A
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US2610300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |