Patent US3441294A successfully refreshed from Google Patents.
US3441294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling having bonded liner
Assignee: WAYNE KRIEG CO Inc
•
Filing: 1966-03-16
•
Granted: 1969-04-29
•
Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Galen W Krieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:15
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/02; F16L13/0254; F16L13/0263; F16L13/0218; F16L13/0236
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US400600A
Cited
US492159A
Cited
US2805591A
Cited
US2936186A
Cited
US3006663A
Cited
US3061339A
Cited
US3228714A
Cited
US3233922A
Cited
US3266821A
Cited
US3286341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |