Patent US3298124A successfully refreshed from Google Patents.
Patent US2728688A successfully refreshed from Google Patents.
US2728688A
Expired / Lapsed
US
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Anchoring process for moistureproof heat-sealable regenerated cellulose film
Assignee: Olin Corp
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Filing: 1953-01-07
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Granted: 1955-12-27
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Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Wellisch Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:06
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/50; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/3187; Y10T428/31873; Y10T428/31942; Y10T428/31949; Y10T428/31953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR IMPROVING THE ANCHORING OF AN AQUEOUS DISPERSION COPOLYMER HEAT-SEALABLE TOP COAT, TO A BASE FILM OF REGENERATED CELLULOSE, COMPRISING MODIFYING A CATIONIC, WET STRENGTH, UREA-FORMALDEHYDE RESIN BY REACTING SAID RESIN WITH GLYCEROL AT ELEVATED TEMPERATURES AND OVER A PERIOD OF HOURS TO EFFECT DEHYDRATION AND SOFTENING OF THE RESIN, MAKING A WATER SOLUTION OF SAID RESIN, APPLYING SAID SOLUTION TO THE REGENERATED CELLULOSE FILM, DRYING THE FILM AND THEN TOP-COATING WITH SAID AQUEOUS DISPERSION COPOLYMER.
Claim 2
Dependent Claim
78 words
A PROCESS FOR IMPROVING THE ANCHORING OF AN AQUEOUS DISPERSION COPOLYMER HEAT-SEALABLE TOP COAT, TO A BASE FILM OF REGENERATED CELLULOSE, COMPRISING MODIFYING A CATIONIC, WET STRENGTH, UREA-FORMALDEHYDE RESIN BY REACTING SAID RESIN WITH GLYCEROL AT ELEVATED TEMPERATURES AND OVER A PERIOD OF HOURS TO EFFECT DEHYDRATION AND SOFTENING OF THE RESIN, MAKING A WATER SOLUTION OF SAID RESIN, APPLYING SAID SOLUTION TO THE REGENERATED CELLULOSE FILM, DRYING THE FILM AND THEN TOP-COATING WITH SAID AQUEOUS DISPERSION COPOLYMER.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |