US387961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Return-vent protector for plumbers
Assignee: —
•
Filing: —
•
Granted: 1888-08-14
•
Expires: 1905-08-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; E03C1/284; E03C1/288; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3222; Y10T137/3258; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7911; Y10T137/8593; Y10T137/86292
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) | 1891-08-14 | 1892-02-13 | 1892-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1895-08-14 | 1896-02-13 | 1896-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1899-08-14 | 1900-02-13 | 1900-08-15 | $7700.00 | Window Closed / Lapsed |