US3468870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying insulin employing carboxymethyl cellulose
Assignee: SmithKline Beecham Corp
•
Filing: 1966-02-17
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Granted: 1969-09-23
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Expires: 1986-02-17
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Howard Smith
- 👤 Derek Thomas
- 👤 Andrew Harklestone Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/575; C07K14/62; C07K14/625; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/843; Y10S530/845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |