US2983961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow molding of polytetrafluoroethylene
Assignee: Resistoflex Corp
•
Filing: 1957-01-30
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Granted: 1961-05-16
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Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 William E Titterton
- 👤 Kamp Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0005; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2023/00; B29L2023/18; Y; Y10; Y10S; Y10S264/00; Y10S264/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF BLOW MOLDING ARTICLES FROM POLYTETRAFLUOROETHYLENE RESIN COMPRISING THE STEPS OF PLACING A RAPIDLY QUENCHED SINTERED TUBE OF PASTE EXTRUDED POLYTETRAFLUOROETHYLENE IN A MOLD WHOSE MOLDING CAVITIES ARE RESTRICTED TO AN INTERMEDIATE PORTION OF THE TUBE, AFFIXING PLUGS TO THE ENDS OF SAID TUBE FOR SUPPLYING PRESSURIZED AIR TO THE INTERIOR THEREOF, HEATING SAID TUBE ALONG SAID INTEMEDIATE PORTION WHILE MAINTAINING THE ENDS THEREOF AT A LOWER TEMPERATURE UNTIL SAID INTERMEDIATE PORTION IS CLOSE TO BUT BELOW THE GEL POINT OF THE
Claim 2
Independent Claim
84 words
THE METHOD OF BLOW MOLDING ARTICLES FROM POLYTETRAFLUOROETHYLENE RESIN COMPRISING THE STEPS OF PLACING A RAPIDLY QUENCHED SINTERED TUBE OF PASTE EXTRUDED POLYTETRAFLUOROETHYLENE IN A MOLD WHOSE MOLDING CAVITIES ARE RESTRICTED TO AN INTERMEDIATE PORTION OF THE TUBE, AFFIXING PLUGS TO THE ENDS OF SAID TUBE FOR SUPPLYING PRESSURIZED AIR TO THE INTERIOR THEREOF, HEATING SAID TUBE ALONG SAID INTEMEDIATE PORTION WHILE MAINTAINING THE ENDS THEREOF AT A LOWER TEMPERATURE UNTIL SAID INTERMEDIATE PORTION IS CLOSE TO BUT BELOW THE GEL POINT OF THE
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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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |