US3516689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded pipe connection
Assignee: FLEXWEIGHT CORP
•
Filing: 1968-08-19
•
Granted: 1970-06-23
•
Expires: 1988-08-19
Abstract
No abstract record available.
Inventors
- 👤 Robert F Binford
- 👤 Otis N Rodgers
- 👤 George A Pace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/02; F16L13/0254; F16L13/0263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1871371A
Cited
DE642206C
Cited
US1986357A
Cited
US2388924A
Cited
US2635901A
Cited
US2509363A
Cited
GB819390A
Cited
FR1199181A
Cited
GB898640A
Cited
US3288495A
Cited
FR1431797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |