US2450150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston for rotary engines
Assignee: Mcculloch Corp
•
Filing: 1945-06-14
•
Granted: 1948-09-28
•
Expires: 1965-06-14
Abstract
No abstract record available.
Inventors
- 👤 Robert P Mcculloch
- 👤 John L Ryde
- 👤 Gudmundsen Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/063; F01C1/07; F02; F02B; F02B53/00
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) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |