Patent US3539033A successfully refreshed from Google Patents.
Patent US2447067A successfully refreshed from Google Patents.
US2447067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly for pressure regulators and the like
Assignee: Airco Inc
•
Filing: 1944-06-01
•
Granted: 1948-08-17
•
Expires: 1964-06-01
Abstract
No abstract record available.
Inventors
- 👤 James K Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:41
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0663; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7826
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US75094A
Cited
US1566255A
Cited
US1807200A
Cited
US1756337A
Cited
US2082227A
Cited
US2330610A
Cited
US2342659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |