Patent US2440725A successfully refreshed from Google Patents.
US2440725A
Expired / Lapsed
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Method of making composite plastic lined metal pipe
Assignee: American Pipe and Construction Co
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Filing: 1944-09-04
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Granted: 1948-05-04
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Expires: 1964-09-04
Abstract
No abstract record available.
Inventors
- 👤 Charles G Munger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
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)
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US667646A
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US1301714A
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US1395963A
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US1755416A
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GB323054A
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US2027961A
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US2190371A
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US2343096A
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US2423902A
Cited
US2417881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |