US2801708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purging system
Assignee: Stewart Warner Corp
•
Filing: 1955-04-06
•
Granted: 1957-08-06
•
Expires: 1975-04-06
Abstract
No abstract record available.
Inventors
- 👤 John T Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/32; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/265; Y10T137/2663; Y10T137/2668; Y10T137/2693; Y10T137/7722; Y10T137/7837; Y10T137/7838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1786199A
Cited
US1998223A
Cited
US2266947A
Cited
US2277491A
Cited
US2395941A
Cited
US2496577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |