Patent US1047719A successfully refreshed from Google Patents.
Patent US2800141A successfully refreshed from Google Patents.
US2800141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow regulators
Assignee: Individual
•
Filing: 1953-01-07
•
Granted: 1957-07-23
•
Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Harry A Hedland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1907162A
Cited
US2198487A
Cited
US2321573A
Cited
US2353191A
Cited
US2351035A
Cited
US2584418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |