Patent US39A successfully refreshed from Google Patents.
US39A
Expired / Lapsed
US
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Purifying- wateil for use in steamt-boilees
Assignee: —
•
Filing: —
•
Granted: 1836-10-04
•
Expires: 1853-10-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/025; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/815; Y10S505/816; Y10S505/825; Y10S505/872
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) | 1839-10-04 | 1840-04-04 | 1840-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1843-10-04 | 1844-04-04 | 1844-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1847-10-04 | 1848-04-04 | 1848-10-04 | $7700.00 | Window Closed / Lapsed |