Patent US1372431A successfully refreshed from Google Patents.
Patent US3247666A successfully refreshed from Google Patents.
Patent US4417347A successfully refreshed from Google Patents.
Patent US2168585A successfully refreshed from Google Patents.
Patent US4081833A successfully refreshed from Google Patents.
Patent US2198976A successfully refreshed from Google Patents.
US326469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent pipe-coupling
Assignee: —
•
Filing: —
•
Granted: 1885-09-15
•
Expires: 1902-09-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:34
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/02; F16L13/04; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/472
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) | 1888-09-14 | 1889-03-16 | 1889-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1892-09-14 | 1893-03-16 | 1893-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1896-09-14 | 1897-03-16 | 1897-09-15 | $7700.00 | Window Closed / Lapsed |