US1725429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation apparatus
Assignee: Individual
•
Filing: 1927-09-08
•
Granted: 1929-08-20
•
Expires: 1947-09-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert H Van Schaack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30223; B01J2219/304; B01J2219/30408; B01J2219/30416; Y; Y10; Y10S; Y10S261/00; Y10S261/72
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) | 1932-08-19 | 1933-02-18 | 1933-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-08-19 | 1937-02-18 | 1937-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-08-19 | 1941-02-18 | 1941-08-20 | $7700.00 | Window Closed / Lapsed |