Patent US2898233A successfully refreshed from Google Patents.
US2898233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable polyethylene dispersion containing no emulsifying agent and method of coating therewith
Assignee: Beazer East Inc
•
Filing: 1958-07-31
•
Granted: 1959-08-04
•
Expires: 1978-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hmiel Stanley Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:56
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; B; B05; B05D; B05D7/00; B05D7/14; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C08J3/09; C08J3/091; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/06; C09D123/08; C09D123/0807; C09D123/0815; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
METHOD OF PREPARING SUBSTRATES HAVING A CONTINUOUS, IMPERMEABLE, FLEXIBLE, ADHERENT LINEAR POLYETHYLENE COATING COMPRISING FORMING A STABLE POLYETHYLENE DISPERSION COMPRISING UP 60% BY WEIGHT OF A LINEAR POLYETHYLENE DISPERED IN THE ABSENCE OF AN EMULSIFYING AGENT ESSENTIALLY BY THE ACTION OF A LIQUID MEDIUM HAVING A SURFACE TENSION OF ABOUT 25-42.5 DYNES/CM. AT 25*C. AND A SPECIFIC GRAVITY OF ABOUT 0.875-1.025 AT 25*C., APPLYING SAID DISPERSION TO A SUBSTRATE TO OBTAIN A SUBSTANTIALLY UNIFORM COATING OF WETTED POLYETHYLENE THEREON, HEATING THE COATED SUBSTRATE AT A TEMPERATURE OF ABOUT 175-230*C. TO FORM ON THE SUBSTRATE A CONTINUOUS, IMPERMEABLE, FLEXIBLE LINEAR POLYETHYLENE COATING, AND COOLING THE HEATED SUBSTRATE.
Claim 2
Dependent Claim
106 words
METHOD OF PREPARING SUBSTRATES HAVING A CONTINUOUS, IMPERMEABLE, FLEXIBLE, ADHERENT LINEAR POLYETHYLENE COATING COMPRISING FORMING A STABLE POLYETHYLENE DISPERSION COMPRISING UP 60% BY WEIGHT OF A LINEAR POLYETHYLENE DISPERED IN THE ABSENCE OF AN EMULSIFYING AGENT ESSENTIALLY BY THE ACTION OF A LIQUID MEDIUM HAVING A SURFACE TENSION OF ABOUT 25-42.5 DYNES/CM. AT 25*C. AND A SPECIFIC GRAVITY OF ABOUT 0.875-1.025 AT 25*C., APPLYING SAID DISPERSION TO A SUBSTRATE TO OBTAIN A SUBSTANTIALLY UNIFORM COATING OF WETTED POLYETHYLENE THEREON, HEATING THE COATED SUBSTRATE AT A TEMPERATURE OF ABOUT 175-230*C. TO FORM ON THE SUBSTRATE A CONTINUOUS, IMPERMEABLE, FLEXIBLE LINEAR POLYETHYLENE COATING, AND COOLING THE HEATED SUBSTRATE.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |