Patent US2575581A successfully refreshed from Google Patents.
US2575581A
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Coated rubber hydrochloride film
Assignee: Wingfoot Corp
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Filing: 1949-04-20
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Granted: 1951-11-20
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Expires: 1969-04-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
RUBBER HYDROCHLORIDE FILM .0004 TO .002 INCH THICK CONTAINING 5 TO 25 PARTS OF FATTY ACID ESTER PER ONE HUNDRED PARTS OF RUBBER HYDROCHLORIDE AS PLASTICIZER, SAID FILM BEING CAOTED WITH COPOLYMER OF 75 TO 85 PARTS VINYLIDENE CHLORIDE AND 25 TO 15 PARTS OF ACRYLONITRILE HAVING A VISCOSITY OF 40 TO 1000 CENTIPOISES, THE COATING WEIGHTING ONE OF FIVE POUNDS PER 3000 SQUARE FEET AND MAKING THE FILM LESS PERVIOUS TO OXYGEN.
Claim 2
Dependent Claim
73 words
RUBBER HYDROCHLORIDE FILM .0004 TO .002 INCH THICK CONTAINING 5 TO 25 PARTS OF FATTY ACID ESTER PER ONE HUNDRED PARTS OF RUBBER HYDROCHLORIDE AS PLASTICIZER, SAID FILM BEING CAOTED WITH COPOLYMER OF 75 TO 85 PARTS VINYLIDENE CHLORIDE AND 25 TO 15 PARTS OF ACRYLONITRILE HAVING A VISCOSITY OF 40 TO 1000 CENTIPOISES, THE COATING WEIGHTING ONE OF FIVE POUNDS PER 3000 SQUARE FEET AND MAKING THE FILM LESS PERVIOUS TO OXYGEN.
References Cited (Backward Citations)
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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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |