Patent US2664378A successfully refreshed from Google Patents.
US2664378A
Expired / Lapsed
US
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Manufacture of articles from polyethylene films
Assignee: EIDP Inc
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Filing: 1950-05-29
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Granted: 1953-12-29
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 George W Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:05
CPC Classifications
B; B32; B32B; B32B27/00; C; C09; C09J; C09J121/00; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR ADHESIVELY BONDING POLYETHYLENE FILMS TOGETHER WHICH COMPRISES APPLYING PRESSURE TO THE FILM SURFACES HAVING AN INTERVENING LAYER OF A COMPOSITION COMPRISING A VOLATILE NORMALLY LIQUID ORGANIC SOLVENT OF THE CLASS CONSISTING OF DIALKYL ETHERS, ALKYL ESTERS OF ALKANOIC ACIDS AND DIALKYL KETONES, HAVING A BOILING POINT BELOW 150* C., A RUBBER DISPERSED IN THE SAID SOLVENT IN THE FORM OF DISCRETE SOLID PARTICLES, A RUBBER DISSOLVED IN THE SAID SOLVENT AND A TACKIFIER OF THE CLASS CONSISTING OF WOOD ROSIN, DIETHYLENE GLYCOL ESTERS OF POLYMERIZED WOOD ROSIN, POLYCYCLIC AROMATIC HYDROCARBONS HAVING MOLECULAR WEIGHTS WITHIN THE RANGE OF 500 TO 2000, MALEIC ANHYDRIDE-MODIFIED ESTER GUMS, COUMARONE-INDENE RESINS, HYDROGENATED WOOD ROSIN, AND GLYCEROL ESTER OF POLYMERIZED WOOD ROSIN, AND THEREAFTER REMOVING THE SAID SOLVENT BY DIFFUSION THROUGH THE SAID POLYETHYLENE FILMS AND BY EVAPORATION.
Claim 2
Dependent Claim
135 words
A PROCESS FOR ADHESIVELY BONDING POLYETHYLENE FILMS TOGETHER WHICH COMPRISES APPLYING PRESSURE TO THE FILM SURFACES HAVING AN INTERVENING LAYER OF A COMPOSITION COMPRISING A VOLATILE NORMALLY LIQUID ORGANIC SOLVENT OF THE CLASS CONSISTING OF DIALKYL ETHERS, ALKYL ESTERS OF ALKANOIC ACIDS AND DIALKYL KETONES, HAVING A BOILING POINT BELOW 150* C., A RUBBER DISPERSED IN THE SAID SOLVENT IN THE FORM OF DISCRETE SOLID PARTICLES, A RUBBER DISSOLVED IN THE SAID SOLVENT AND A TACKIFIER OF THE CLASS CONSISTING OF WOOD ROSIN, DIETHYLENE GLYCOL ESTERS OF POLYMERIZED WOOD ROSIN, POLYCYCLIC AROMATIC HYDROCARBONS HAVING MOLECULAR WEIGHTS WITHIN THE RANGE OF 500 TO 2000, MALEIC ANHYDRIDE-MODIFIED ESTER GUMS, COUMARONE-INDENE RESINS, HYDROGENATED WOOD ROSIN, AND GLYCEROL ESTER OF POLYMERIZED WOOD ROSIN, AND THEREAFTER REMOVING THE SAID SOLVENT BY DIFFUSION THROUGH THE SAID POLYETHYLENE FILMS AND BY EVAPORATION.
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |