US3545068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure amplification
Assignee: Bowles Engineering Corp
•
Filing: 1967-07-12
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Granted: 1970-12-08
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Expires: 1987-07-12
Abstract
No abstract record available.
Inventors
- 👤 Romald E Bowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:19
CPC Classifications
B; B05; B05B; B05B12/00; B05B12/02; B05B12/06; E; E21; E21B; E21B7/00; E21B7/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1751719A
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US1887985A
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US2061032A
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US2745647A
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US3099965A
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US3137997A
Cited
US3070178A
Cited
US3371618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |