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Patent US2187931A successfully refreshed from Google Patents.
US2187931A
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US
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Fluid compressor construction
Assignee: Westinghouse Air Brake Co
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Filing: 1938-03-23
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Granted: 1940-01-23
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Expires: 1958-03-23
Abstract
No abstract record available.
Inventors
- 👤 Rankin J Bush
- 👤 William H Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:08
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B49/243; F04B27/00; F04B27/005; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7559; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-01-22 | 1943-07-24 | 1944-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-22 | 1947-07-24 | 1948-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-22 | 1951-07-24 | 1952-01-23 | $7700.00 | Window Closed / Lapsed |