US3146746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple walled corrugated tubing
Assignee: METALLSCHLAUCHFABRIK AG
•
Filing: 1960-12-05
•
Granted: 1964-09-01
•
Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 Dreyer Marco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1459487A
Cited
US2008077A
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FR747029A
Cited
US1964289A
Cited
US2158796A
Cited
US2288094A
Cited
US2314611A
Cited
US2392194A
Cited
US2490513A
Cited
US2876801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |