US2804736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preserving regenerated cellulose pellicle
Assignee: EIDP Inc
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Filing: 1953-09-14
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Granted: 1957-09-03
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Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Lichtblau Ellis Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS OF PRESERVING PELLICULAR STRUCTURES OF REGENERATED CELLULOSE WHICH COMPRISES IMPREGNATING A PELLICULAR STRUCTURE OF GEL REGENERATED CELLULOSE WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL SALT OF DICHLOROPHENE, PASSING THE IMPREGNATED STRUCTURE THROUGH A DILUTE ACID SOLUTION, WHEREBY TO PRECIPITATE DICHLOROPHENE IN SAID STRUCTURE, AND THEREAFTER PLACING SAID STRUCTURE IN AN AQUEOUS SOLUTION COMPRISING ORTHO TOLYL BIGUANIDE.
Claim 2
Dependent Claim
59 words
A PROCESS OF PRESERVING PELLICULAR STRUCTURES OF REGENERATED CELLULOSE WHICH COMPRISES IMPREGNATING A PELLICULAR STRUCTURE OF GEL REGENERATED CELLULOSE WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL SALT OF DICHLOROPHENE, PASSING THE IMPREGNATED STRUCTURE THROUGH A DILUTE ACID SOLUTION, WHEREBY TO PRECIPITATE DICHLOROPHENE IN SAID STRUCTURE, AND THEREAFTER PLACING SAID STRUCTURE IN AN AQUEOUS SOLUTION COMPRISING ORTHO TOLYL BIGUANIDE.
References Cited (Backward Citations)
GB555761A
Cited
US2480084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |