Patent US1988274A successfully refreshed from Google Patents.
US2633456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic film
Assignee: Wingfoot Corp
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Filing: 1949-01-17
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Granted: 1953-03-31
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Expires: 1969-01-17
Abstract
No abstract record available.
Inventors
- 👤 Paul J Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
C; C08; C08L; C08L15/00; C08L15/02; C08K; C08K5/00; C08K5/04; C08K5/10; C08L67/00; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
FLEXIBLE, HEAT-SEALABLE, SELF-SUSTAINING FILM FOR PACKAGING, WHICH FILM IS .00025 TO .0025 INCH THICK AND IS COMPOSED ESSENTIALLY OF 100 PARTS BY WEIGHT OF RUBBER HYDROCHLORIDE, 5 TO 25 PARTS BY WEIGHT OF ESTER PLASTICIZER OF THE CLASS CONSISTING OF BUTYL STEARATE, DIBUTYL SEBACATE, METHOXYETHYL OLEATE, POLYETHYLENE GLYCOL DI-2-ETHYL HEXOATE, BUTOXYETHYL STEARATE, METHOXYETHYL ACETYL RICINOLEATE, METHYL PHTHALYL ETHYL GLYCOLATE AND ACETYL TRIBUTYL CITRATE, AND 25 TO 40 PARTS BY WEIGHT OF COPOLYMER OBTAINED FROM 50 TO 80 PARTS OF 1,3-BUTADIENE AND 50 TO 20 PARTS OF ACRYLONITRILE, THE SUM OF THE ESTER PLASTICIZER AND COPOLYMER NOT EXCEEDING 50 PARTS BY WEIGHT.
Claim 2
Dependent Claim
101 words
FLEXIBLE, HEAT-SEALABLE, SELF-SUSTAINING FILM FOR PACKAGING, WHICH FILM IS .00025 TO .0025 INCH THICK AND IS COMPOSED ESSENTIALLY OF 100 PARTS BY WEIGHT OF RUBBER HYDROCHLORIDE, 5 TO 25 PARTS BY WEIGHT OF ESTER PLASTICIZER OF THE CLASS CONSISTING OF BUTYL STEARATE, DIBUTYL SEBACATE, METHOXYETHYL OLEATE, POLYETHYLENE GLYCOL DI-2-ETHYL HEXOATE, BUTOXYETHYL STEARATE, METHOXYETHYL ACETYL RICINOLEATE, METHYL PHTHALYL ETHYL GLYCOLATE AND ACETYL TRIBUTYL CITRATE, AND 25 TO 40 PARTS BY WEIGHT OF COPOLYMER OBTAINED FROM 50 TO 80 PARTS OF 1,3-BUTADIENE AND 50 TO 20 PARTS OF ACRYLONITRILE, THE SUM OF THE ESTER PLASTICIZER AND COPOLYMER NOT EXCEEDING 50 PARTS BY WEIGHT.
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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |