US2417881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making plastic-metal pipe
Assignee: American Pipe and Construction Co
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Filing: 1943-12-13
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Granted: 1947-03-25
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Expires: 1963-12-13
Abstract
No abstract record available.
Inventors
- 👤 Charles G Munger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:58
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/24; B29C49/26; B29C63/00; B29C63/0065; B29C63/0069; B29C63/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-24 | 1950-09-23 | 1951-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-24 | 1954-09-23 | 1955-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-24 | 1958-09-23 | 1959-03-25 | $7700.00 | Window Closed / Lapsed |