Patent US2326157A successfully refreshed from Google Patents.
US2326157A
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Activated anhydrite, process of making the same, and product including it
Assignee: Sherwin Williams Co
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Filing: 1940-12-17
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Granted: 1943-08-10
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Expires: 1960-12-17
Abstract
No abstract record available.
Inventors
- 👤 Andrew T Mccord
- 👤 Harold F Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:31
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/46; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084; C09C1/02; C09C1/025; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; C01P; C01P2006/00; C01P2006/60
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) | 1946-08-09 | 1947-02-08 | 1947-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-09 | 1951-02-08 | 1951-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-09 | 1955-02-08 | 1955-08-10 | $7700.00 | Window Closed / Lapsed |