US3214501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making non-adhesive, highly cohesive microporous plastic bandage material or the like
Assignee: Esb-Reeves Corp
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Filing: 1961-09-12
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Granted: 1965-10-26
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Expires: 1981-09-12
Abstract
No abstract record available.
Inventors
- 👤 Howard J Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:11
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/02; A61F13/0273; A61F13/15; A61F13/56; A61F13/58; A61F2013/00089; A61F2013/00102; A61F2013/00246
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
THE METHOD OF MAKING A NON-ADHESIVE, HIGHLY COHESIVE MICROPOROUS PLASTIC SHEET MATERIAL WHICH COMPRISES MIXING AND BLENDING TOGETHER POLYETHYLENE AND FINELY DIVIDED STARCH IN RATIO OF STARCH TO POLYETHYLENE OF ABOUT 4:1, DURING THE BLENDING APPLYING AT ELEVATED TEMPERATURE A CONTINUED WIPING ACTION BY DIFFERENTIAL ROLLS, SAID TEMPERATURE BEING WITHIN THE RANGE OF A SOFTENING TEMPERATURE OF POLYETHYLENE AND BELOW THAT WHICH PRODUCES CHARRING OF THE STARCH, BLENDING BUTYL RUBBER INTO THE MIXTURE OF POLYETHYLENE AND STARCH TO FORM A COMPOSITION HAVING A RATIO OF STARCH TO POLYETHYLENE TO BUTYL RUBBER OF ABOUT 4:1 1/2, SHAPING THE MIXTURE OF STARCH, POLYETHYLENE AND BUTYL RUBBER INTO SHEET MATERIAL, IMMERSING THE SHEET MATERIAL IN AN AQUEOUS BATH AT A TEMPERATURE BELOW THAT WHICH PRODUCES SUBSTANTIAL EXPANSION OF THE STARCH PARTICLES, THEREAFTER ELEVATING THE TEMPERATURE OF THE BATH FOR EXPANSION OF THE STARCH PARTICLES, AND LEACHING THE EXPANDED STARCH PARTICLES FROM THE MIXTURE TO PRODUCE MICROPOROSITY OF THE SHEET MATERIAL.
Claim 2
Independent Claim
157 words
THE METHOD OF MAKING A NON-ADHESIVE, HIGHLY COHESIVE MICROPOROUS PLASTIC SHEET MATERIAL WHICH COMPRISES MIXING AND BLENDING TOGETHER POLYETHYLENE AND FINELY DIVIDED STARCH IN RATIO OF STARCH TO POLYETHYLENE OF ABOUT 4:1, DURING THE BLENDING APPLYING AT ELEVATED TEMPERATURE A CONTINUED WIPING ACTION BY DIFFERENTIAL ROLLS, SAID TEMPERATURE BEING WITHIN THE RANGE OF A SOFTENING TEMPERATURE OF POLYETHYLENE AND BELOW THAT WHICH PRODUCES CHARRING OF THE STARCH, BLENDING BUTYL RUBBER INTO THE MIXTURE OF POLYETHYLENE AND STARCH TO FORM A COMPOSITION HAVING A RATIO OF STARCH TO POLYETHYLENE TO BUTYL RUBBER OF ABOUT 4:1 1/2, SHAPING THE MIXTURE OF STARCH, POLYETHYLENE AND BUTYL RUBBER INTO SHEET MATERIAL, IMMERSING THE SHEET MATERIAL IN AN AQUEOUS BATH AT A TEMPERATURE BELOW THAT WHICH PRODUCES SUBSTANTIAL EXPANSION OF THE STARCH PARTICLES, THEREAFTER ELEVATING THE TEMPERATURE OF THE BATH FOR EXPANSION OF THE STARCH PARTICLES, AND LEACHING THE EXPANDED STARCH PARTICLES FROM THE MIXTURE TO PRODUCE MICROPOROSITY OF THE SHEET MATERIAL.
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |