Patent US3372049A successfully refreshed from Google Patents.
US3372049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin film composition, film, and pressure-sensitive adhesive sheet material
Assignee: 3M Co
•
Filing: 1961-10-09
•
Granted: 1968-03-05
•
Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Albert N Schaffhausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:20
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/24; C09J7/241; C09J7/243; C08L2205/00; C08L2205/02; C08L2205/025; C08L2207/00; C08L2207/06; C08L2207/07; C08L2207/10; C08L2207/14; C08L23/16; C08L23/18; C08L23/20; C08L2314/00; C08L2314/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A POLY-MONO-ALPHA-OLEFINIC COMPOSITION WHICH CAN BE FORMED INTO A SHEET CAPABLE OF BIAXIAL ORIENTATION TO A UNIFORM THICKNESS OF AT LEAST ABOUT 1 MIL AND TO A TENSILE STRENGTH OF SUBSTANTIALLY MORE THAN 6,000 P.S.I. IN MUTUALLY PERPENDICULAR DIRECTIONS, COMPRISING A UNIFORM PHYSICAL BLEND, SOLID AT ROOM TEMPERATURE, OF POLYMERS CONSISTING ESSENTIALLY OF FROM ABOUT 50% TO ABOUT 75% PREDOMINANTLY CRYSTALLINE ISOTACTIC POLYPROPYLENE HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 250,000 AND CORRESPONDINGLY FROM ABOUT 50% TO ABOUT 25% OF AT LEAST ONE SEPARATELY PREPARED PREDOMINANTLY CRYSTALLINE POLY-MONOALPHA-OLEFINIC HOMOPOLYMER OTHER THAN POLYPROPYLENE.
Claim 2
Dependent Claim
93 words
A POLY-MONO-ALPHA-OLEFINIC COMPOSITION WHICH CAN BE FORMED INTO A SHEET CAPABLE OF BIAXIAL ORIENTATION TO A UNIFORM THICKNESS OF AT LEAST ABOUT 1 MIL AND TO A TENSILE STRENGTH OF SUBSTANTIALLY MORE THAN 6,000 P.S.I. IN MUTUALLY PERPENDICULAR DIRECTIONS, COMPRISING A UNIFORM PHYSICAL BLEND, SOLID AT ROOM TEMPERATURE, OF POLYMERS CONSISTING ESSENTIALLY OF FROM ABOUT 50% TO ABOUT 75% PREDOMINANTLY CRYSTALLINE ISOTACTIC POLYPROPYLENE HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 250,000 AND CORRESPONDINGLY FROM ABOUT 50% TO ABOUT 25% OF AT LEAST ONE SEPARATELY PREPARED PREDOMINANTLY CRYSTALLINE POLY-MONOALPHA-OLEFINIC HOMOPOLYMER OTHER THAN POLYPROPYLENE.
References Cited (Backward Citations)
GB217125A
Cited
US2631954A
Cited
US2825721A
Cited
US3112300A
Cited
US3013003A
Cited
US2931740A
Cited
GB871183A
Cited
US3036087A
Cited
US3086958A
Cited
US3079272A
Cited
US3281501A
Cited
US3146284A
Cited
US3265771A
Cited
US3088848A
Cited
US3144430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |