US3121767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for fabricating sheet formed molded articles
Assignee: Illinois Tool Works Inc
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Filing: 1961-05-10
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Granted: 1964-02-18
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Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Donald S Welshon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:22
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/42; B29C51/428; Y; Y10; Y10S; Y10S220/00; Y10S220/14; Y10S264/00; Y10S264/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF FORMING SELECTED THICK PORTIONS IN A FINISHED ARTICLE MADE FROM UNIFORM THICKNESS SHEET STOCK PLASTIC MATERIAL COMPRISING THE STEPS OF RELATIVELY MOVING OPPOSED FEMALE CAVITY MOLD MEMBER AND MALE PLUNGER MOLD MEMBER TOWARD EACH OTHER AND WHICH ARE DISPOSED ON OPPOSITE SIDES OF A FIRMLY CLAMPED WEB OF SUBSTANTIALLY UNIFORM IN THICKNESS PLASTIC MATERIAL HEATED TO A TEMPERATURE SUFFICIENT TO AFFORD READY STRETCHING THEREOF, THEN COOLING SELECTED PORTIONS ONLY OF THE CLAMPED HEATED PLASTIC MATERIAL BY ONE OF SAID FEMALE AND MALE MOLD MEMBERS AND TO A TEMPERATURE SUFFICIENTLY LOW SO AS TO
Claim 2
Independent Claim
96 words
A METHOD OF FORMING SELECTED THICK PORTIONS IN A FINISHED ARTICLE MADE FROM UNIFORM THICKNESS SHEET STOCK PLASTIC MATERIAL COMPRISING THE STEPS OF RELATIVELY MOVING OPPOSED FEMALE CAVITY MOLD MEMBER AND MALE PLUNGER MOLD MEMBER TOWARD EACH OTHER AND WHICH ARE DISPOSED ON OPPOSITE SIDES OF A FIRMLY CLAMPED WEB OF SUBSTANTIALLY UNIFORM IN THICKNESS PLASTIC MATERIAL HEATED TO A TEMPERATURE SUFFICIENT TO AFFORD READY STRETCHING THEREOF, THEN COOLING SELECTED PORTIONS ONLY OF THE CLAMPED HEATED PLASTIC MATERIAL BY ONE OF SAID FEMALE AND MALE MOLD MEMBERS AND TO A TEMPERATURE SUFFICIENTLY LOW SO AS TO
References Cited (Backward Citations)
CA613809A
Cited
US2336821A
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US2336822A
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US2468697A
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US2878513A
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US2924852A
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US2962758A
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FR1224425A
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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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |