US2003308A
Expired / Lapsed
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Centrifugal fractionating method and apparatus
Assignee: Individual
•
Filing: 1932-08-10
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Granted: 1935-06-04
•
Expires: 1952-08-10
Abstract
No abstract record available.
Inventors
- 👤 Walter J Podbielniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:30
CPC Classifications
C; C10; C10G; C10G7/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0476; B01D11/048; B01D3/00; B01D3/08; B01D3/14; B01D3/30; B01J; B01J19/00; B01J19/28; F; F16; F16D; F16D33/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00081; B01J2219/00087; B01J2219/00101; B01J2219/00132; B01J2219/00135; B01J2219/0015; B01J2219/00155; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-06-03 | 1938-12-03 | 1939-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-03 | 1942-12-03 | 1943-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-03 | 1946-12-03 | 1947-06-04 | $7700.00 | Window Closed / Lapsed |