US1578766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Parkersburg Rig and Reel Co
•
Filing: 1925-01-19
•
Granted: 1926-03-30
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Expires: 1945-01-19
Abstract
No abstract record available.
Inventors
- 👤 Schwemlein William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/06; F16K15/063; F16K15/066; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7837; Y10T137/7838; Y10T137/7841; Y10T137/7842; Y10T137/7897; Y10T137/7904; Y10T137/7908; Y10T137/7921; Y10T137/8593; Y10T137/86292; Y10T137/86324
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) | 1929-03-29 | 1929-09-28 | 1930-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-29 | 1933-09-28 | 1934-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-29 | 1937-09-28 | 1938-03-30 | $7700.00 | Window Closed / Lapsed |