Patent US2464237A successfully refreshed from Google Patents.
Patent US3034571A successfully refreshed from Google Patents.
US3034571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Penn Controls Inc
•
Filing: 1957-04-29
•
Granted: 1962-05-15
•
Expires: 1977-04-29
Abstract
No abstract record available.
Inventors
- 👤 Russell B Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:57
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/105; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/8704
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1826205A
Cited
US2483191A
Cited
US1850457A
Cited
US2138796A
Cited
US2290047A
Cited
US2351277A
Cited
US2380836A
Cited
US2429739A
Cited
US2652071A
Cited
US2783723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |