US2562955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon containing derivatives of cellulosic material
Assignee: Individual
•
Filing: 1948-05-07
•
Granted: 1951-08-07
•
Expires: 1968-05-07
Abstract
No abstract record available.
Inventors
- 👤 Hartwig A Schuyten
- 👤 Jeremiah W Weaver
- 👤 Reid John David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
C; C08; C08B; C08B15/00; C08B15/05
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A HOMOGENEOUS CELLULOSIC DERIVATIVE HAVING AN AVERAGE HYDROXYL SUBSTITUTION OF 0.13 TO 3.0 ALKYL-SILYL GROUPS PER GLUCOSE UNIT CALCULATED ON THE C6 GLUCOSE UNIT FORMULAE FOR CELLULOSE.
References Cited (Backward Citations)
US2306222A
Cited
GB575675A
Cited
US2405988A
Cited
GB575696A
Cited
US2413050A
Cited
US2476107A
Cited
US2520963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |