Patent US1441864A successfully refreshed from Google Patents.
US1441864A
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Means for treating steam and cinders
Assignee: PURPOSED MIND DEV SECURITY
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Filing: 1919-06-16
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Granted: 1923-01-09
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Expires: 1939-06-16
Abstract
No abstract record available.
Inventors
- 👤 Viola K Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:12
CPC Classifications
F; F23; F23C; F23C99/00; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/04; B01D17/047; B01D24/00; B01D24/02; B01D24/10; B01D24/18; B01D39/00; B01D39/02; B01D39/06; F23J; F23J15/00; F23J15/02; F23J15/022; F23K; F23K3/00; F28; F28B; F28B5/00; F23C2700/00; F23C2700/06; F23C2700/066; F23K2203/00; F23K2203/008
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) | 1926-01-08 | 1926-07-10 | 1927-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-01-08 | 1930-07-10 | 1931-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-01-08 | 1934-07-10 | 1935-01-09 | $7700.00 | Window Closed / Lapsed |