Patent US1732504A successfully refreshed from Google Patents.
US1990141A
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Assignee: MITCHELL SPECIALTY Co
•
Filing: 1931-01-16
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Granted: 1935-02-05
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Expires: 1951-01-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Seitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:58
CPC Classifications
E; E05; E05F; E05F7/00; E05F7/04; E05F5/00; E05F5/02; E05F5/022; E05F5/025; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531; Y; Y10; Y10S; Y10S292/00; Y10S292/39
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) | 1938-02-04 | 1938-08-06 | 1939-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-04 | 1942-08-06 | 1943-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-04 | 1946-08-06 | 1947-02-05 | $7700.00 | Window Closed / Lapsed |