US2954868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masking tape
Assignee: 3M Co
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Filing: 1957-09-25
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Granted: 1960-10-04
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Expires: 1977-09-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Swedish
- 👤 Lloyd E Picard
- 👤 Drew Richard Gurley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/29; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/26; Y10T428/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PRESSURE-SENSITIVE ADHESIVE TAPE OF THE CHARACTER DESCRIBED, WOUND UPON ITSELF IN ROLL FROM THE CONSISTING OF A DUPLEX FILM-PAPER BACKING COATED ON THE PAPER SIDE WITH AN AGGRESSIVELY TACKY PRESSURE-SENSITIVE ADHESIVE, SAID BACKING COMPRISING A CALENDAR COMBINATION OF A HARD-CALENDER SEMI-GLASSINE BEATER-LATEX-SIZED WETCREPED PAPER ELEMENT COATED ON THE SHARP SIDE WITH A DEAD-STRETCH PIGMENT-LOADED RUBBERY FILM ELEMENT INTEGRALLY UNITED THERETO, SAID PAPER ELEMENT CONTAINING SIZING SOLIDS IN THE PROPORTION OF 10 TO 50% OF THE PAPER FIBERS ON A DRY WEIGHT BASIS AND HAVING 40 TO 100 CREPE LINES PER LINEAL INCH, SUCH THAT THE TAPE IS FINGER-TEARABLE, HAS A SMOOTH-FEELING BACK SURFACE, HAS A DEAD-STRETCH AND A STRETCH VALUE OF AT LEAST 15% WHEN HAND PULLED, IS NONSLIVERING, AND CAN BE UNWOUND FROM THE ROLL WITHOUT DELAMINATION OR INTERNAL RUPTURE AND WITHOUT OFFSETTING OF ASHESIVE.
Claim 2
Dependent Claim
137 words
A PRESSURE-SENSITIVE ADHESIVE TAPE OF THE CHARACTER DESCRIBED, WOUND UPON ITSELF IN ROLL FROM THE CONSISTING OF A DUPLEX FILM-PAPER BACKING COATED ON THE PAPER SIDE WITH AN AGGRESSIVELY TACKY PRESSURE-SENSITIVE ADHESIVE, SAID BACKING COMPRISING A CALENDAR COMBINATION OF A HARD-CALENDER SEMI-GLASSINE BEATER-LATEX-SIZED WETCREPED PAPER ELEMENT COATED ON THE SHARP SIDE WITH A DEAD-STRETCH PIGMENT-LOADED RUBBERY FILM ELEMENT INTEGRALLY UNITED THERETO, SAID PAPER ELEMENT CONTAINING SIZING SOLIDS IN THE PROPORTION OF 10 TO 50% OF THE PAPER FIBERS ON A DRY WEIGHT BASIS AND HAVING 40 TO 100 CREPE LINES PER LINEAL INCH, SUCH THAT THE TAPE IS FINGER-TEARABLE, HAS A SMOOTH-FEELING BACK SURFACE, HAS A DEAD-STRETCH AND A STRETCH VALUE OF AT LEAST 15% WHEN HAND PULLED, IS NONSLIVERING, AND CAN BE UNWOUND FROM THE ROLL WITHOUT DELAMINATION OR INTERNAL RUPTURE AND WITHOUT OFFSETTING OF ASHESIVE.
References Cited (Backward Citations)
US1962340A
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US2251273A
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US2458166A
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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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |