Patent US4872144A successfully refreshed from Google Patents.
Patent US534412A successfully refreshed from Google Patents.
US534412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
John h
Assignee: —
•
Filing: 1892-10-08
•
Granted: 1895-02-19
•
Expires: 1912-10-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:31
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/048; Y; Y10; Y10S; Y10S203/00; Y10S203/18
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) | 1898-02-18 | 1898-08-20 | 1899-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-02-19 | 1902-08-21 | 1903-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-02-19 | 1906-08-21 | 1907-02-20 | $7700.00 | Window Closed / Lapsed |