Patent US2550369A successfully refreshed from Google Patents.
US2550369A
Expired / Lapsed
US
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Single-acting reciprocating engine
Assignee: Dunlop Rubber Co Ltd
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Filing: 1948-08-07
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Granted: 1951-04-24
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Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
- 👤 Moreillon Albert Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:32
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0005; F04B39/0022; F04B53/00; F04B53/14; F04B53/144; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32688; Y10T74/00; Y10T74/21; Y10T74/2142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |