Patent US3535484A successfully refreshed from Google Patents.
US3535484A
Expired / Lapsed
US
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Method of improving physical properties of electric resistance welded steel pipe
Assignee: American Cast Iron Pipe Co
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Filing: 1967-05-26
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Granted: 1970-10-20
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Expires: 1987-05-26
Abstract
No abstract record available.
Inventors
- 👤 William E Snow
- 👤 Joseph R Pegues
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:54
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2047254A
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US2078356A
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US2235243A
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US2262705A
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US3015018A
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US3192080A
Cited
US3317703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |