US2580351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose sulfamylethyl ether
Assignee: Hercules Powder Co
•
Filing: 1948-12-22
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Granted: 1951-12-25
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Expires: 1968-12-22
Abstract
No abstract record available.
Inventors
- 👤 Vernon R Grassie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:03
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; Y; Y10; Y10S; Y10S162/00; Y10S162/03; Y10S8/00; Y10S8/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A WATER-INSOLUBLE SULFAMYLETHYL ETHER OF CELLULOSE CONTAINING FROM ABOUT 0.2 TO ABOUT 0.65 SULFAMYLETHYL GROUP PER GLUCOSE UNIT.
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |