Patent US6431599B1 successfully refreshed from Google Patents.
US2977971A
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Fluid distribution system and valves therefor
Assignee: New York Air Brake LLC
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Filing: 1958-04-03
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Granted: 1961-04-04
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Charles A L Ruhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/32; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/3056; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/42; F15B2211/428; F15B2211/45; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50536; F15B2211/52; F15B2211/528; F15B2211/60; F15B2211/605; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/71; F15B2211/80; F15B2211/86; F15B2211/8606; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2589; Y10T137/2592
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2219488A
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US2665552A
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US2765808A
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US2852918A
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US2835266A
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US2813536A
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US2837107A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |