Patent US3608849A successfully refreshed from Google Patents.
US3608849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeronautical balloons
Assignee: Union Carbide Corp
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Filing: 1969-07-10
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Granted: 1971-09-28
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Expires: 1989-07-10
Abstract
Abstract An aeronautical balloon is fabricated from a biaxially oriented plastic film which is obtained from a polyolefin resin composition comprising a homopolymer of copolymer of ethylene of at least about 50 percent by weight.
Inventors
- 👤 William F Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:04
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
An aeronautical balloon as defined by claim 6 in which said resin is a copolymer of said polyolefin with a monomer selected from the group consisting of vinyl acetate, methylacrylate, acrylic acid, ethylene acrylate, neohexene and methacrylic acid.
Claim 2
Dependent Claim
20 words
The aeronautical balloon of claim 6 wherein the polyolefin film is polyethylene having a density of less than about 0.919.
Claim 3
Dependent Claim
12 words
The aeronautical balloon of claim 6 wherein the polyolefin resin is polypropylene.
References Cited (Backward Citations)
US3149017A
Cited
US3182932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |