US3314449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tube
Assignee: Krone KG
•
Filing: 1964-02-12
•
Granted: 1967-04-18
•
Expires: 1984-02-12
Abstract
No abstract record available.
Inventors
- 👤 Krone Gustav
- 👤 Forberg Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PLASTIC TUBE COMPRISING A TUBULAR CORE OF THERMOPLASTIC OR THERMOSETTING PLASTIC HAVING INNER AND OUTER SURFACES, SAID OUTER SURFACE BEING PROVIDED WITH ALTERNATE AXIALLY EXTENDING RIBS AND GROOVES, GLASS FILAMENT ROVINGS
Claim 2
Dependent Claim
32 words
A PLASTIC TUBE COMPRISING A TUBULAR CORE OF THERMOPLASTIC OR THERMOSETTING PLASTIC HAVING INNER AND OUTER SURFACES, SAID OUTER SURFACE BEING PROVIDED WITH ALTERNATE AXIALLY EXTENDING RIBS AND GROOVES, GLASS FILAMENT ROVINGS
References Cited (Backward Citations)
US666241A
Cited
US1831724A
Cited
US2393496A
Cited
US2969812A
Cited
GB820945A
Cited
US2937662A
Cited
US3002534A
Cited
US3230979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |