US2671656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil separator
Assignee: Surface Combustion Corp
•
Filing: 1950-05-12
•
Granted: 1954-03-09
•
Expires: 1970-05-12
Abstract
No abstract record available.
Inventors
- 👤 Frank J Winder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:10
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663; C21D9/673; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870551A
Cited
US2073724A
Cited
US2230310A
Cited
US2362823A
Cited
US2414130A
Cited
US2489012A
Cited
US2607577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |