Patent US1754975A successfully refreshed from Google Patents.
US1754975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonreturn valve
Assignee: Individual
•
Filing: 1927-12-29
•
Granted: 1930-04-15
•
Expires: 1947-12-29
Abstract
No abstract record available.
Inventors
- 👤 Andersen Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:16
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K47/00; F16K47/01; F16K47/011; F16K47/0111; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915
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) | 1933-04-14 | 1933-10-14 | 1934-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-14 | 1937-10-14 | 1938-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-14 | 1941-10-14 | 1942-04-15 | $7700.00 | Window Closed / Lapsed |