Patent US620847A successfully refreshed from Google Patents.
US620847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
jackson
Assignee: —
•
Filing: —
•
Granted: 1899-03-07
•
Expires: 1916-03-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:47
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1523; Y10T74/1526; Y10T74/1527; Y10T74/18; Y10T74/18048; Y10T74/18056; Y10T74/18296
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) | 1902-03-07 | 1902-09-06 | 1903-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-03-07 | 1906-09-06 | 1907-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-03-07 | 1910-09-06 | 1911-03-08 | $7700.00 | Window Closed / Lapsed |