US2956904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive tapes
Assignee: 3M Co
•
Filing: 1954-11-04
•
Granted: 1960-10-18
•
Expires: 1974-11-04
Abstract
No abstract record available.
Inventors
- 👤 James O Hendricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:24
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/383; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2852; Y10T428/2857
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS OF MAKING RUBBER-RESIN TYPE PRESSURESENSITIVE ADHESIVE SHEETING, THE STEPS OF FORMING A PRESSURE-SENSITIVE ADHESIVE LAYER ADAPTED TO PROVIDE THE RUBBER-RESIN TYPE PRESSURE-SENSITIVE ADHESIVE MATERIAL OF THE PRODUCT, SAID ADHESIVE LAYER COMPRISING A POLYMER CROSSLINKABLE BY HIGH-ENERGY ELECTRON IRRADIATION, AND IRRADIATING SAID LAYER WITH HIGH-ENERGY ELECTRONS TO PROVIDE A TOTAL IRRADIATION DOSE LEVEL OF ABSORPTION OF BETWEEN APPROXIMATELY 1 AND 20 MEGAREPS., SAID ADHESIVE LAYER BEING AT LEAST APPROXIMATELY DOUBLED IN COHESIVE STRENGTH AS MEASURED BY THE HOT SHEAR TEST HEREIN DEFINED WITHOUT SUFFERING A LOSS OF PRESSURE-SENSITIVE ADHESIVE PROPERTIES AS A RESULT OF SAID IRRADIATION.
Claim 2
Dependent Claim
98 words
IN A PROCESS OF MAKING RUBBER-RESIN TYPE PRESSURESENSITIVE ADHESIVE SHEETING, THE STEPS OF FORMING A PRESSURE-SENSITIVE ADHESIVE LAYER ADAPTED TO PROVIDE THE RUBBER-RESIN TYPE PRESSURE-SENSITIVE ADHESIVE MATERIAL OF THE PRODUCT, SAID ADHESIVE LAYER COMPRISING A POLYMER CROSSLINKABLE BY HIGH-ENERGY ELECTRON IRRADIATION, AND IRRADIATING SAID LAYER WITH HIGH-ENERGY ELECTRONS TO PROVIDE A TOTAL IRRADIATION DOSE LEVEL OF ABSORPTION OF BETWEEN APPROXIMATELY 1 AND 20 MEGAREPS., SAID ADHESIVE LAYER BEING AT LEAST APPROXIMATELY DOUBLED IN COHESIVE STRENGTH AS MEASURED BY THE HOT SHEAR TEST HEREIN DEFINED WITHOUT SUFFERING A LOSS OF PRESSURE-SENSITIVE ADHESIVE PROPERTIES AS A RESULT OF SAID IRRADIATION.
References Cited (Backward Citations)
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Cited
US1906402A
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US2410079A
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US2763609A
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US2756220A
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |