US3342915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Undercut molding apparatus and method
Assignee: Illinois Tool Works Inc
•
Filing: 1965-02-03
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Granted: 1967-09-19
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Expires: 1985-02-03
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Wanderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:42
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/30; B29C51/00; B29C51/26; B29C51/30; B29C67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF FORMING UNDERCUTS IN ARTICLES MADE FROM SHEET STOCK PLASTIC MATERIAL COMPRISING HEATING A WEB OF PLASTIC MATERIAL TO ITS FORMING TEMPERATURE FOR MOLDING THEREOF, FORMING AN INTERMEDIATE ARTICLE OF DESIRED CONFIGURATION IN SAID HEATED WEB, COOLING SPACED PORTIONS OF SAID INTERMEDIAT ARTICLE BELOW THE FORMING TEMPERATURE WHILE MAINTAINING AN INTERMEDIATE PORTION
Claim 2
Independent Claim
54 words
A METHOD OF FORMING UNDERCUTS IN ARTICLES MADE FROM SHEET STOCK PLASTIC MATERIAL COMPRISING HEATING A WEB OF PLASTIC MATERIAL TO ITS FORMING TEMPERATURE FOR MOLDING THEREOF, FORMING AN INTERMEDIATE ARTICLE OF DESIRED CONFIGURATION IN SAID HEATED WEB, COOLING SPACED PORTIONS OF SAID INTERMEDIAT ARTICLE BELOW THE FORMING TEMPERATURE WHILE MAINTAINING AN INTERMEDIATE PORTION
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |