Patent US2170099A successfully refreshed from Google Patents.
US2170099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine having diametrically opposed cylinders
Assignee: Tilling Stevens Ltd
•
Filing: 1937-11-30
•
Granted: 1939-08-22
•
Expires: 1957-11-30
Abstract
No abstract record available.
Inventors
- 👤 Stubings Alfred James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:57
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B75/246; F01; F01B; F01B9/00; F01B9/02; F01B9/026; F02B75/32; F02B2275/00; F02B2275/34; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18208
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |