Patent US6060997A successfully refreshed from Google Patents.
Patent US2111137A successfully refreshed from Google Patents.
US2111137A
Expired / Lapsed
US
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Calcium sulphate-zinc sulphide pigment
Assignee: EIDP Inc
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Filing: 1934-10-13
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Granted: 1938-03-15
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Expires: 1954-10-13
Abstract
No abstract record available.
Inventors
- 👤 James E Booge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:23
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C09C1/06; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60; C01P2006/80
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) | 1941-03-14 | 1941-09-13 | 1942-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-14 | 1945-09-13 | 1946-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-14 | 1949-09-13 | 1950-03-15 | $7700.00 | Window Closed / Lapsed |