Patent US2389882A successfully refreshed from Google Patents.
Patent US478791A successfully refreshed from Google Patents.
US478791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
gardner
Assignee: —
•
Filing: —
•
Granted: 1892-07-12
•
Expires: 1909-07-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
E; E21; E21B; E21B21/00
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) | 1895-07-12 | 1896-01-11 | 1896-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1899-07-12 | 1900-01-11 | 1900-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1903-07-13 | 1904-01-12 | 1904-07-13 | $7700.00 | Window Closed / Lapsed |