US2835242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve in head for internal combustion engine
Assignee: Individual
•
Filing: 1956-07-03
•
Granted: 1958-05-20
•
Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Harold L Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30; F02F1/32; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/34; Y; Y10; Y10S; Y10S123/00; Y10S123/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1316454A
Cited
FR636639A
Cited
US1209502A
Cited
US1301007A
Cited
US2016734A
Cited
US1861045A
Cited
US2071125A
Cited
US2758580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |