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Patent US1809215A successfully refreshed from Google Patents.
US1809215A
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Process of making vitrified argillaceous products
Assignee: JOSEPH B SHAW
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Filing: 1929-11-04
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Granted: 1931-06-09
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Expires: 1949-11-04
Abstract
No abstract record available.
Inventors
- 👤 William B Pine
- 👤 Joseph B Shaw
- 👤 Myril C Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:28
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/323; C04B33/02; C04B33/025; C04B33/13; C04B33/14; C04B33/326; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/65; C04B2235/656; C04B2235/6565; C04B2235/66; C04B2235/661; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/96; C04B2235/9607; C04B2235/9615
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) | 1934-06-08 | 1934-12-08 | 1935-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-08 | 1938-12-08 | 1939-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-08 | 1942-12-08 | 1943-06-09 | $7700.00 | Window Closed / Lapsed |