← Back to Patent Explorer
US1960335A Expired / Lapsed US ⏱️ 0.0 years remaining

Check valve

Assignee: Individual
•
Filing: 1933-04-17
•
Granted: 1934-05-29
•
Expires: 1953-04-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Dewey J Finnie
  • 👤 Elza W Greer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 15:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8085

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

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) 1937-05-28 1937-11-27 1938-05-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1941-05-28 1941-11-27 1942-05-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1945-05-28 1945-11-27 1946-05-29 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag