US3367918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric amide-secondary dialkyl ammonium salt-paraformaldehyde flocculant composition and method
Assignee: Dow Chemical Co
•
Filing: 1964-08-04
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Granted: 1968-02-06
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 Chester A Lesinski
- 👤 Joseph W Van Wyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:26
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; C02; C02F; C02F1/00; C02F1/52; C02F1/5227; C02F1/5236; C02F1/54; C08; C08B; C08B1/00; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2328901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |