Patent US1867294A successfully refreshed from Google Patents.
US1867294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of salt-glazing brick and other clay products
Assignee: WHITACRE GREER FIREPROOFING Co
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Filing: 1931-08-14
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Granted: 1932-07-12
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Expires: 1951-08-14
Abstract
No abstract record available.
Inventors
- 👤 John B Whitacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:31
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/34
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) | 1935-07-12 | 1936-01-11 | 1936-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-07-12 | 1940-01-11 | 1940-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-07-12 | 1944-01-11 | 1944-07-12 | $7700.00 | Window Closed / Lapsed |