US2745231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning the inside of pipe
Assignee: Dow Chemical Co
•
Filing: 1954-04-12
•
Granted: 1956-05-15
•
Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 Charles A Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0552; B24; B24B; B24B31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US597185A
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US1415600A
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US1475431A
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US1808870A
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US2087694A
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US2382262A
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US2478961A
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US2668307A
Cited
US2605596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |