US3415804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of mixtures of proteinaceous substances using polyethylene glycol
Assignee: South African Inventions Development Corp
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Filing: 1967-03-31
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Granted: 1968-12-10
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Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Polson Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:27
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/02; A61K39/395; B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0039; C; C07; C07K; C07K1/00; C07K1/14; C07K1/30; C07K14/00; C07K14/195; C07K14/33; C07K14/435; C07K14/745; C07K14/75; C07K14/76; C07K14/765; C07K16/00; C07K16/06; C07K16/065; C12; C12N; C12N9/00; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816; Y10S530/00; Y10S530/82; Y10S530/825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |