Patent US1286972A successfully refreshed from Google Patents.
Patent US74469A successfully refreshed from Google Patents.
US74469A
Expired / Lapsed
US
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Improvement in steam-heaters for brewers and others
Assignee: —
•
Filing: —
•
Granted: 1868-02-11
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Expires: 1885-02-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:09
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23126; B01F23/231265
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) | 1871-02-10 | 1871-08-12 | 1872-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-02-10 | 1875-08-12 | 1876-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-02-10 | 1879-08-12 | 1880-02-11 | $7700.00 | Window Closed / Lapsed |