US3524661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connection for steel and plastic pipe
Assignee: W & R Industries Inc
•
Filing: 1969-01-08
•
Granted: 1970-08-18
•
Expires: 1989-01-08
Abstract
No abstract record available.
Inventors
- 👤 Jack Farnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:18
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/20; F16L47/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290776A
Cited
US2424863A
Cited
DE810335C
Cited
GB808984A
Cited
DE1158779B
Cited
DE1158777B
Cited
US3408099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |