US3666836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polypropylene with hydrogenated hydrocarbon resins
Assignee: Hercules LLC
•
Filing: 1969-09-26
•
Granted: 1972-05-30
•
Expires: 1989-09-26
Abstract
Abstract Blends of polypropylene with hydrogenated polymers and copolymers of styrene. The useful polymers have a precisely defined molecular weight distribution and must be hydrogenated to the point where at least 50 percent of the aromatic unsaturation is reduced. The blends are useful in preparation of heat sealable films and capacitor dielectrics.
Inventors
- 👤 Andrew John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04; C08L; C08L23/00; C08L23/02; C08L23/10; C08K; C08K5/00; C08K5/0008; C08K5/005; C08L25/00; C08L25/02; C08L25/04; C08L25/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
An unsupported film prepared from a composition according to claim 1.
Claim 2
Dependent Claim
17 words
A film according to claim 2 which has been oriented along at least one of its axes.
References Cited (Backward Citations)
US3299174A
Cited
GB1024718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |