US2917397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic pellicle and method of preparation
Assignee: EIDP Inc
•
Filing: 1957-04-11
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Granted: 1959-12-15
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Wilcox Clifton Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08K5/04; C08K5/05; C08K5/053; C08J2301/00; C08J2301/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A FLEXIBLE, DURABLE, TRANSPARENT CELLULOSIC PELLICLE SELECTED FROM THE GROUP CONSISTING OF REGENERATED CELLULOSE, GLYCOL CELLULOSE, CELLULOSE GLYCOLIC ACID, LOWLY ESTERIFIED CELLULOSE DERIVATIVES AND LOWLY ETHERIFIED CELLULOSE DERIVATIVES CONTAINING 8-25% OF 2-4 PENTANEDIOL, 2-METHYL BASED ON THE COMBINED WEIGHT OF THE CELLULOSIC PELLICLE AND 2-4 PENTANEDIOL, 2-METHYL.
Claim 2
Dependent Claim
47 words
A FLEXIBLE, DURABLE, TRANSPARENT CELLULOSIC PELLICLE SELECTED FROM THE GROUP CONSISTING OF REGENERATED CELLULOSE, GLYCOL CELLULOSE, CELLULOSE GLYCOLIC ACID, LOWLY ESTERIFIED CELLULOSE DERIVATIVES AND LOWLY ETHERIFIED CELLULOSE DERIVATIVES CONTAINING 8-25% OF 2-4 PENTANEDIOL, 2-METHYL BASED ON THE COMBINED WEIGHT OF THE CELLULOSIC PELLICLE AND 2-4 PENTANEDIOL, 2-METHYL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |