US2036617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clays and processes for preparing same
Assignee: AMERICAN COLLOID SALES DIVISIO
•
Filing: 1934-09-07
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Granted: 1936-04-07
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Expires: 1954-09-07
Abstract
No abstract record available.
Inventors
- 👤 Bechtner Paul
- 👤 Winfred B Hirschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:35
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025; Y; Y10; Y10S; Y10S507/00; Y10S507/904; Y10S516/00; Y10S516/01
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) | 1939-04-07 | 1939-10-07 | 1940-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-07 | 1943-10-07 | 1944-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-07 | 1947-10-07 | 1948-04-07 | $7700.00 | Window Closed / Lapsed |