US2915786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making coherent unsintered plastic tape
Assignee: Continental-Diamond Fibre Corp
•
Filing: 1957-07-26
•
Granted: 1959-12-08
•
Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Haroldson
- 👤 Jr Edward A Mulrooney
- 👤 Hogan William Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:26
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2027/00; B29K2027/12; B29K2027/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF FORMING UNSINTERED POLYTETRAFLUOROETHYLENE TAPE WITH HIGH TRANSVERSE STRENGHT WHICH COMPRISES, PLACING A COMPACT CONICAL PROTRUDED-RECESSED ENDED PERFORM OF POWDERED MATERIAL MIXED WITH A LUBRICANT IN AN EXTRUSION PRESS HAVING A POT AND RAM FITTING THE PREFORM, AND FORCING THE MIXTURE DOWN A TAPERED DIE INTO A SMALL ROD SHAPE IN A LONG DIE LAND AND FORCING THE ROD SHAPE OUT INTO A FAN SHAPED DIE OF INCREASING WIDTH AND DECREASING DEPTH AND CROSS-SECTIONAL AREA BETWEEN ITS ENTRY AND DELIVERY ENDS TO FORM A TAPE AT A PRESSURD OF ABOUT THREE-HUNDRED THOUSAND POUNDS PER
Claim 2
Independent Claim
96 words
THE METHOD OF FORMING UNSINTERED POLYTETRAFLUOROETHYLENE TAPE WITH HIGH TRANSVERSE STRENGHT WHICH COMPRISES, PLACING A COMPACT CONICAL PROTRUDED-RECESSED ENDED PERFORM OF POWDERED MATERIAL MIXED WITH A LUBRICANT IN AN EXTRUSION PRESS HAVING A POT AND RAM FITTING THE PREFORM, AND FORCING THE MIXTURE DOWN A TAPERED DIE INTO A SMALL ROD SHAPE IN A LONG DIE LAND AND FORCING THE ROD SHAPE OUT INTO A FAN SHAPED DIE OF INCREASING WIDTH AND DECREASING DEPTH AND CROSS-SECTIONAL AREA BETWEEN ITS ENTRY AND DELIVERY ENDS TO FORM A TAPE AT A PRESSURD OF ABOUT THREE-HUNDRED THOUSAND POUNDS PER
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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |