US2489911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam cylinder valve gear
Assignee: Worthington Pump and Machinery Corp
•
Filing: 1944-06-16
•
Granted: 1949-11-29
•
Expires: 1964-06-16
Abstract
No abstract record available.
Inventors
- 👤 Eric J Lifner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:34
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/042
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |