US1843576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filler and reenforcing pigment for plastics and method of making the same
Assignee: PURE CALCIUM PRODUCTS Co
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Filing: 1929-04-24
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Granted: 1932-02-02
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Expires: 1949-04-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Mcclure
- 👤 John W Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:41
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/309; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K9/00; C01P; C01P2004/00; C01P2004/60; C01P2006/00; C01P2006/90
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) | 1935-02-01 | 1935-08-03 | 1936-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-01 | 1939-08-03 | 1940-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-01 | 1943-08-03 | 1944-02-02 | $7700.00 | Window Closed / Lapsed |