US3436262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning by foam contact,and foam regeneration method
Assignee: Dow Chemical Co
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Filing: 1964-09-25
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Granted: 1969-04-01
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Crowe
- 👤 Roger G Duranleau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:21
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0094; B; B08; B08B; B08B3/00; B08B3/003; F; F28; F28G; F28G9/00; C11D2111/00; C11D2111/40; C11D2111/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1351089A
Cited
AT75203B
Cited
US1560286A
Cited
US2563151A
Cited
US2759019A
Cited
US3078190A
Cited
US3037887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |