US2597952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Packard Motor Car Co
•
Filing: 1947-09-02
•
Granted: 1952-05-27
•
Expires: 1967-09-02
Abstract
No abstract record available.
Inventors
- 👤 Rosenlund Iver Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:41
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1319787A
Cited
US685549A
Cited
US912576A
Cited
AT74521B
Cited
GB439138A
Cited
US2250813A
Cited
US2313564A
Cited
US2294568A
Cited
US2374895A
Cited
US2400817A
Cited
US2405127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |