US2450833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge forming device
Assignee: Niles Bement Pond Co
•
Filing: 1943-11-16
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Granted: 1948-10-05
•
Expires: 1963-11-16
Abstract
No abstract record available.
Inventors
- 👤 Lee Leighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:48
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/022; F02D2700/0223; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2559; Y10T137/2562
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US311147A
Cited
GB191119977A
Cited
US1343735A
Cited
GB228300A
Cited
GB523895A
Cited
US2295656A
Cited
US2361227A
Cited
US2348008A
Cited
US2324599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |