Patent US3722013A successfully refreshed from Google Patents.
Patent US520150A successfully refreshed from Google Patents.
US520150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
William a
Assignee: —
•
Filing: —
•
Granted: 1894-05-22
•
Expires: 1911-05-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:30
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/32; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/108; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7478; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87748
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1897-05-21 | 1897-11-20 | 1898-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-05-22 | 1901-11-21 | 1902-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-05-22 | 1905-11-21 | 1906-05-23 | $7700.00 | Window Closed / Lapsed |