Patent US3387630A successfully refreshed from Google Patents.
US3387630A
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US
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Adjustable pressure reducing device
Assignee: Dow Chemical Co
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Filing: 1965-04-22
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Granted: 1968-06-11
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Willis G Routson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D29/00; B01D29/11; B01D29/114; B01D29/117; B01D35/00; B01D35/14; B01D35/147; B01D35/157; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US994167A
Cited
US2467150A
Cited
GB824365A
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US2988222A
Cited
US3060966A
Cited
US3180825A
Cited
US3170872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |