US2907342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids flow control apparatus
Assignee: Union Oil Company of California
•
Filing: 1954-03-01
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Granted: 1959-10-06
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Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Clyde H O Berg
- 👤 Robert D Clark
- 👤 Jr John E Hines
- 👤 Robert L Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:32
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0218; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/6198; Y10T137/6253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US717122A
Cited
GB190522909A
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FR583438A
Cited
US1826941A
Cited
US1803889A
Cited
US2065637A
Cited
US2598381A
Cited
US2711332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |