Patent US3503218A successfully refreshed from Google Patents.
Patent US3523826A successfully refreshed from Google Patents.
US3523826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of cleaning piping systems
Assignee: Baker Petrolite LLC
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Filing: 1967-07-17
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Granted: 1970-08-11
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Expires: 1987-07-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Lissant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:15
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2748084A
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US2032174A
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US2326837A
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US2343136A
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US2482904A
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US2524825A
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US2744555A
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US2810665A
Cited
US3085918A
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US3118793A
Cited
US3391084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |