Patent US2542717A successfully refreshed from Google Patents.
US3429954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a polymer-lined pipe
Assignee: Dow Chemical Co
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Filing: 1965-03-22
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Granted: 1969-02-25
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Expires: 1985-03-22
Abstract
No abstract record available.
Inventors
- 👤 Bobby L Atkins
- 👤 Billy G Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:30
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/38; B29C63/46
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |