Patent US3237791A successfully refreshed from Google Patents.
Patent US252471A successfully refreshed from Google Patents.
US252471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
johnson
Assignee: —
•
Filing: —
•
Granted: 1882-01-17
•
Expires: 1899-01-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:17
CPC Classifications
C; C12; C12C; C12C7/00; C12C7/14; C12C7/16; C12C7/17
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) | 1885-01-16 | 1885-07-18 | 1886-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1889-01-16 | 1889-07-18 | 1890-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1893-01-16 | 1893-07-18 | 1894-01-17 | $7700.00 | Window Closed / Lapsed |