US3534986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint
Assignee: Benteler Deutschland GmbH
•
Filing: 1968-09-09
•
Granted: 1970-10-20
•
Expires: 1988-09-09
Abstract
No abstract record available.
Inventors
- 👤 Franz-Josef Hartmann
- 👤 Heinz Menne
- 👤 Eckehard Hanert
- 👤 Helmut Benteler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:39
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L13/00; F16L13/08; F16L58/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590811A
Cited
FR669311A
Cited
US2132574A
Cited
US2174218A
Cited
US2513365A
Cited
US2888783A
Cited
US3107421A
Cited
US3427050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |