US2383653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicic acid sols
Assignee: EIDP Inc
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Filing: 1941-06-04
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Granted: 1945-08-28
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Expires: 1961-06-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:49
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/141; C01B33/142; C01B33/143; C01B33/145; C01B33/146; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C14; C14C; C14C3/00; C14C3/02; C14C3/04; D21H17/00; D21H17/63; D21H17/67; D21H17/68; D21H19/44; D21H19/46
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) | 1948-08-27 | 1949-02-26 | 1949-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-08-27 | 1953-02-26 | 1953-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-08-27 | 1957-02-26 | 1957-08-28 | $7700.00 | Window Closed / Lapsed |