Patent US3651477A successfully refreshed from Google Patents.
US2676929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stock material for microporous articles and methods of making the same from starch and polyethylene
Assignee: Exide Technologies LLC
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Filing: 1951-08-23
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Granted: 1954-04-27
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Expires: 1971-08-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Duddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF PRODUCING A THERMOPLASTIC STOCK FOR THE PRODUCTION OF MICROPOROUS ARTICLES WHICH COMPRISES MIXING AND BLENDING TOGETHER FINELY DIVIDED STARCH AND POLYETHYLENE WHICH WILL AT ELEVATED TEMPERATURE SUFFICIENTLY SOFTEN IN THE ABSENCE OF A PLASTICIZER TO COAT THE FINELY DIVIDED STARCH, DURING THE BLENDING OF SAID STARCH AND SAID RESIN APPLYING AT ELEVATED TEMPERATURE A CONTINUING WIPING ACTION BY DIFFERENTIAL ROLLS, SAID TEMPERATURE RANGE BEING FROM ABOUT 220* F. TO 250* F., SAID WIPING ACTION UNDER PRESSURE BEING CONTINUED FOR A PERIOD ADEQUATE TO PRODUCE SUBSTANTIALLY COMPLETE DISPERSAL OF THE STARCH INTO THE SOFTENED RESIN.
Claim 2
Independent Claim
97 words
THE METHOD OF PRODUCING A THERMOPLASTIC STOCK FOR THE PRODUCTION OF MICROPOROUS ARTICLES WHICH COMPRISES MIXING AND BLENDING TOGETHER FINELY DIVIDED STARCH AND POLYETHYLENE WHICH WILL AT ELEVATED TEMPERATURE SUFFICIENTLY SOFTEN IN THE ABSENCE OF A PLASTICIZER TO COAT THE FINELY DIVIDED STARCH, DURING THE BLENDING OF SAID STARCH AND SAID RESIN APPLYING AT ELEVATED TEMPERATURE A CONTINUING WIPING ACTION BY DIFFERENTIAL ROLLS, SAID TEMPERATURE RANGE BEING FROM ABOUT 220* F. TO 250* F., SAID WIPING ACTION UNDER PRESSURE BEING CONTINUED FOR A PERIOD ADEQUATE TO PRODUCE SUBSTANTIALLY COMPLETE DISPERSAL OF THE STARCH INTO THE SOFTENED RESIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |