Patent US2730459A successfully refreshed from Google Patents.
US2730459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive tape
Assignee: 3M Co
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Filing: 1952-06-19
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Granted: 1956-01-10
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Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 Reynold E Holmen
- 👤 William E Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:51
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/205; C09J7/21; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
SOLVENT-RESISTANT PRESSURE-SENSITIVE ADHESIVE TAPE HAVING A COATING OF PRESSURE-SENSITIVE ADHESIVE FIRMLY ADHERENTLY BONDED TO A UNIFIED FIBROUS BACKING COMPRISING A THIN POROUS FIBROUS SHEET MATERIAL IMPREGNATED AND UNIFIED WITH A SOLVENT-RESISTANT, RUBBERY, HEAT-REACTED MIXTURE OF AN AMIDE-ESTER POLYMER AND A SMALL AMOUNT OF AN ALDEHYDIC CURING AGENT, SAID POLYMER BEING OBTAINED BY HEATING TOGETHER, AT A HIGH TEMPERATURE, SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF COMPONENTS COMPRISING ESSENTIALLY (A) DICARBOXYLIC ACIDS FROM THE CLASS CONSISTING OF TEREPHTHALIC AND ISOPHTHALIC ACID, AND (B) COMBINATIONS OF A PLURALITY OF POLYGLYCOLS HAVING AN AVERAGE OF AT LEAST TWO ETHER LINKAGES AND AT LEAST ONE NONCYCLIZABLE PRIMARY AMINO MONOALKANOLAMINE HAVING A NON-TERTIARY CARBON ATOM ATTACHED TO THE NITROGEN ATOM; THE POLYGLYCOLS AND MONOALKANOLAMINES BEING SO SELECTED AND PROPORTIONED AS TO PROVIDE AN AVERAGE OF ABOUT 3-12 ETHER LINKAGES, AND ONE AMIDO GROUP HAVING A SINGLE HYDROGEN ATOM ATTACHED TO THE NITROGEN ATOM, FOR APPROXIMATELY EACH 25-90 ATOMS IN THE SKELETAL POLYMER CHAIN.
Claim 2
Dependent Claim
155 words
SOLVENT-RESISTANT PRESSURE-SENSITIVE ADHESIVE TAPE HAVING A COATING OF PRESSURE-SENSITIVE ADHESIVE FIRMLY ADHERENTLY BONDED TO A UNIFIED FIBROUS BACKING COMPRISING A THIN POROUS FIBROUS SHEET MATERIAL IMPREGNATED AND UNIFIED WITH A SOLVENT-RESISTANT, RUBBERY, HEAT-REACTED MIXTURE OF AN AMIDE-ESTER POLYMER AND A SMALL AMOUNT OF AN ALDEHYDIC CURING AGENT, SAID POLYMER BEING OBTAINED BY HEATING TOGETHER, AT A HIGH TEMPERATURE, SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF COMPONENTS COMPRISING ESSENTIALLY (A) DICARBOXYLIC ACIDS FROM THE CLASS CONSISTING OF TEREPHTHALIC AND ISOPHTHALIC ACID, AND (B) COMBINATIONS OF A PLURALITY OF POLYGLYCOLS HAVING AN AVERAGE OF AT LEAST TWO ETHER LINKAGES AND AT LEAST ONE NONCYCLIZABLE PRIMARY AMINO MONOALKANOLAMINE HAVING A NON-TERTIARY CARBON ATOM ATTACHED TO THE NITROGEN ATOM; THE POLYGLYCOLS AND MONOALKANOLAMINES BEING SO SELECTED AND PROPORTIONED AS TO PROVIDE AN AVERAGE OF ABOUT 3-12 ETHER LINKAGES, AND ONE AMIDO GROUP HAVING A SINGLE HYDROGEN ATOM ATTACHED TO THE NITROGEN ATOM, FOR APPROXIMATELY EACH 25-90 ATOMS IN THE SKELETAL POLYMER CHAIN.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |