Patent US3244779A successfully refreshed from Google Patents.
US3244779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective heating and drawing of plastics
Assignee: Individual
•
Filing: 1962-06-29
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Granted: 1966-04-05
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Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Levey John
- 👤 Pylant John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C51/06; B29C51/26; B29C51/42; B29C51/421; B29C51/422; B65; B65H; B65H2801/00; B65H2801/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD FORMING A HOT DUCTILE SHEET OF THERMOPLASTIC MATERIAL INTO A THREE DIMENSIONAL SHAPE COMPRISING FORMING THE MATERIAL INTO A CAVITY MOLD INCLUDING THE STEPS OF PLACING THE MATERIAL OVER THE MOUTH OF A CAVITY MOLD, PROVIDING A HEAT SOURCE OVER THE MOLD, APPLYING PRESSURE TO CAUSE AN AREA OF THE MATERIAL TO MOVE UPWARDLY FROM THE CAVITY MOLD SO AS TO PROGRESSIVELY COME IN CONTACT WITH SURFACES OF THE HEAT SOURCE, AND THEN APPLYING PRESSURE TO FORCE THE SAID AREA OF THE MATERIAL DOWNWARD TO CONFORM TO THE SHAPE OF THE CAVITY MOLD WHEREBY THE HEATING OF THE AREA AS IT IS MOVED UPWARDLY IS DETERMINED BY ITS CONTACTING OF THE HEATED SURFACES SO THAT THERE IS GREATER HEATING OF THE AREA ADJACENT THE RIM OF THE CAVITY MOLD WHEREBY A FORMED ARTICLE IS REALIZED HAVING BOTTOM AND SIDE WALLS OF CONTROLLED THICKNESS DISTRIBUTION.
Claim 2
Independent Claim
146 words
THE METHOD FORMING A HOT DUCTILE SHEET OF THERMOPLASTIC MATERIAL INTO A THREE DIMENSIONAL SHAPE COMPRISING FORMING THE MATERIAL INTO A CAVITY MOLD INCLUDING THE STEPS OF PLACING THE MATERIAL OVER THE MOUTH OF A CAVITY MOLD, PROVIDING A HEAT SOURCE OVER THE MOLD, APPLYING PRESSURE TO CAUSE AN AREA OF THE MATERIAL TO MOVE UPWARDLY FROM THE CAVITY MOLD SO AS TO PROGRESSIVELY COME IN CONTACT WITH SURFACES OF THE HEAT SOURCE, AND THEN APPLYING PRESSURE TO FORCE THE SAID AREA OF THE MATERIAL DOWNWARD TO CONFORM TO THE SHAPE OF THE CAVITY MOLD WHEREBY THE HEATING OF THE AREA AS IT IS MOVED UPWARDLY IS DETERMINED BY ITS CONTACTING OF THE HEATED SURFACES SO THAT THERE IS GREATER HEATING OF THE AREA ADJACENT THE RIM OF THE CAVITY MOLD WHEREBY A FORMED ARTICLE IS REALIZED HAVING BOTTOM AND SIDE WALLS OF CONTROLLED THICKNESS DISTRIBUTION.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |