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Patent US2864724A successfully refreshed from Google Patents.
US2864724A
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US
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Coated film and method of making same
Assignee: Hercules Powder Co
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Filing: 1956-09-21
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Granted: 1958-12-16
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Gerald I Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:47
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J2301/00; C08J2301/06; C08J2475/00; C08J2475/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31942; Y10T428/31949; Y10T428/31953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS OF TREATING NONFIBROUS REGENERATED CELLULOSE FILM WHICH COMPRISES IMPREGNATING SAID FILM WITH AN AQUEOUS SOLUTION OF A HYDROPHILIC CATIONIC TETRAHYDRO TRIAZONE MODIFIED UREA-FORMALDEHYDE RESIN, SAID RESIN BEING A REACTION PRODUCT OF UREA, FROM ABOUT 1,8 TO ABOUT 2.4 MOLES OF FORMALDEHYDE PER MOLE OF UREA AND FROM ABOUT 10% TO ABOUT 100% BY WEIGHT, BASED ON THE WEIGHT OF UREA, OF A TETRAHYDROTRIAZONE, DRYING THE FILM, AND APPLYING THERETO A WATER-REPELLENT COATING.
Claim 2
Dependent Claim
74 words
A PROCESS OF TREATING NONFIBROUS REGENERATED CELLULOSE FILM WHICH COMPRISES IMPREGNATING SAID FILM WITH AN AQUEOUS SOLUTION OF A HYDROPHILIC CATIONIC TETRAHYDRO TRIAZONE MODIFIED UREA-FORMALDEHYDE RESIN, SAID RESIN BEING A REACTION PRODUCT OF UREA, FROM ABOUT 1,8 TO ABOUT 2.4 MOLES OF FORMALDEHYDE PER MOLE OF UREA AND FROM ABOUT 10% TO ABOUT 100% BY WEIGHT, BASED ON THE WEIGHT OF UREA, OF A TETRAHYDROTRIAZONE, DRYING THE FILM, AND APPLYING THERETO A WATER-REPELLENT COATING.
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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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |