US2480215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary contactor
Assignee: National Cylinder Gas Co
•
Filing: 1945-11-10
•
Granted: 1949-08-30
•
Expires: 1965-11-10
Abstract
No abstract record available.
Inventors
- 👤 James H Bowden
- 👤 Nathan W Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/30; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D11/0434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |