US3137664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproof plastic films of increased water vapor permeability and method of making them
Assignee: Arthur D Little Inc
•
Filing: 1960-06-21
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Granted: 1964-06-16
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Expires: 1980-06-21
Abstract
No abstract record available.
Inventors
- 👤 Shulman Joseph
- 👤 John T Howarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
C; C08; C08L; C08L101/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A WATERPROOF PLASTIC SHEET HAVING WATER VAPOR PERMEABILITY, CONSISTING ESSENTIALLY OF A WATERPROOF, WATER-INSOLUBLE, FILM-FORMING PLASTIC MATERIAL WHICH IS NORMALLY SUBSTANTIALLY IMPERVIOUS TO WATER VAPOR TRANSMISSION AND PARTICLES OF SUBSTANTIALLY WATER-INSOLUBLE STARCH UNIFORMLY DISPERSED THEREIN, SAID PARTICLES BEING PRESENT IN AN AMOUNT BETWEEN 20% AND 50% OF SAID PLASTIC MATERIAL, BY WEIGHT, AND INSOLUBLE THEREIN, AND PROVIDING DIRECT CONTACT THROUGH SAID PARTICLES FROM ONE FACE TO THE OTHER OF SAID SHEET, SAID SHEET CONTAINING A MAXIMUM OF ABOUT 5% OF WATER-SOLUBLE MATERIAL, SAID STARCH BEING SUFFICIENTLY INSOLUBLE IN WATER THAT THE AFORESAID RANGE OF WATER-SOLUBLE MATERIAL IS ACHIEVED.
Claim 2
Dependent Claim
98 words
A WATERPROOF PLASTIC SHEET HAVING WATER VAPOR PERMEABILITY, CONSISTING ESSENTIALLY OF A WATERPROOF, WATER-INSOLUBLE, FILM-FORMING PLASTIC MATERIAL WHICH IS NORMALLY SUBSTANTIALLY IMPERVIOUS TO WATER VAPOR TRANSMISSION AND PARTICLES OF SUBSTANTIALLY WATER-INSOLUBLE STARCH UNIFORMLY DISPERSED THEREIN, SAID PARTICLES BEING PRESENT IN AN AMOUNT BETWEEN 20% AND 50% OF SAID PLASTIC MATERIAL, BY WEIGHT, AND INSOLUBLE THEREIN, AND PROVIDING DIRECT CONTACT THROUGH SAID PARTICLES FROM ONE FACE TO THE OTHER OF SAID SHEET, SAID SHEET CONTAINING A MAXIMUM OF ABOUT 5% OF WATER-SOLUBLE MATERIAL, SAID STARCH BEING SUFFICIENTLY INSOLUBLE IN WATER THAT THE AFORESAID RANGE OF WATER-SOLUBLE MATERIAL IS ACHIEVED.
References Cited (Backward Citations)
US1245268A
Cited
US2676929A
Cited
US2868741A
Cited
US2893977A
Cited
US2824023A
Cited
US2935484A
Cited
US3067152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |