Patent US1895284A successfully refreshed from Google Patents.
US1895284A
Expired / Lapsed
US
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Direct heated vertical retort
Assignee: ISBELL PORTER Co
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Filing: 1931-05-09
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Granted: 1933-01-24
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Expires: 1951-05-09
Abstract
No abstract record available.
Inventors
- 👤 Samuel F Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:17
CPC Classifications
C; C10; C10B; C10B1/00; C10B1/02; C10B1/04
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) | 1936-01-24 | 1936-07-25 | 1937-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-01-24 | 1940-07-25 | 1941-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-01-24 | 1944-07-25 | 1945-01-24 | $7700.00 | Window Closed / Lapsed |