US3176591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure flow valve
Assignee: Ex-Cell-O Corp
•
Filing: 1962-10-09
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Granted: 1965-04-06
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Expires: 1982-10-09
Abstract
No abstract record available.
Inventors
- 👤 Donald C Howland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:07
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/32; F15B2211/327; F15B2211/329; F15B2211/50; F15B2211/505; F15B2211/50563; F15B2211/51; F15B2211/513; F15B2211/515; F15B2211/5153; F15B2211/5154; F15B2211/57; F15B2211/60; F15B2211/605; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/80; F15B2211/86; F15B2211/8613; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3064627A
Cited
US3042005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |