US3511246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforated pipe and apparatus for making it
Assignee: Westaflex Werk L und F Westerbarkey and Co GmbH
•
Filing: 1968-08-19
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Granted: 1970-05-12
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Expires: 1988-08-19
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Westerbarkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:30
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/10; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/156; B21C37/157; F; F24; F24F; F24F13/00; F24F13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US224228A
Cited
US3435852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |