US3256140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of paper fibers
Assignee: BASF SE
•
Filing: 1962-05-01
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Granted: 1966-06-14
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Expires: 1982-05-01
Abstract
No abstract record available.
Inventors
- 👤 Poschmann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/012; B03D1/016; C02F1/547; B03D2201/00; B03D2201/002; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR THE FLOTATION OF PAPER FIBERS SUSPENDED IN AN INDUSTRIAL WASTE WATER WHICH COMPRISES: ADDING TO SAID SUSPENSION OF PAPER FIBER (A) AN IONIC SURFACE ACTIVE COMPOUND AND (B) A WATER-SOLUBLE SALT-LIKE POLYMER SELECTED FROM THE CLASS CONSISTING OF (1) THE HOMOPOLYMER OF THE QUATERNARY VINYL MONOMER OF THE FORMULA
Claim 2
Dependent Claim
52 words
A PROCESS FOR THE FLOTATION OF PAPER FIBERS SUSPENDED IN AN INDUSTRIAL WASTE WATER WHICH COMPRISES: ADDING TO SAID SUSPENSION OF PAPER FIBER (A) AN IONIC SURFACE ACTIVE COMPOUND AND (B) A WATER-SOLUBLE SALT-LIKE POLYMER SELECTED FROM THE CLASS CONSISTING OF (1) THE HOMOPOLYMER OF THE QUATERNARY VINYL MONOMER OF THE FORMULA
References Cited (Backward Citations)
GB530556A
Cited
FR1111206A
Cited
US2980657A
Cited
US2883370A
Cited
GB834410A
Cited
GB887900A
Cited
DE1094570B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |