Patent US5041217A successfully refreshed from Google Patents.
US2978376A
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Method for producing laminated articles
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-01-29
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Granted: 1961-04-04
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Expires: 1977-01-29
Abstract
No abstract record available.
Inventors
- 👤 Hulse Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C51/00; B29C51/14; B29C51/145; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD FOR PRODUCING LAMINATED ARTICLES BY A VACUUM FORMING PROCEDURE WHICH CONSISTS OF POSITIONING IN HERMETICALLY SEALED RELATIONSHIP ON A MOLD BOX AT LEAST TWO SHEETS OF THERMOPLASTIC MATERIAL HAVING INTERPOSED AT LEAST ONE AIR PERMEABLE FSLEXIBLE INTERLAYER, EACH SHEET OTHER THAN THE ONE FARTHEST FROM THE MOLD BEING PROVIDED WITH A PLURALITY OF PERFORATIONS, HEAT SOFENTING SAID THERMOPLASTIC MATERIAL AND REDUCING THE PRESSURE WITHIN THE MOLD BOX TO LESS THAN ATMOSPHERIC PRESSURE TO DRAW AIR FROM BETWEEN THE SHEETS AND TO DRAW THE SHEETS INTO ENGAGEMENT WITH THE MOLD.
Claim 2
Independent Claim
91 words
A METHOD FOR PRODUCING LAMINATED ARTICLES BY A VACUUM FORMING PROCEDURE WHICH CONSISTS OF POSITIONING IN HERMETICALLY SEALED RELATIONSHIP ON A MOLD BOX AT LEAST TWO SHEETS OF THERMOPLASTIC MATERIAL HAVING INTERPOSED AT LEAST ONE AIR PERMEABLE FSLEXIBLE INTERLAYER, EACH SHEET OTHER THAN THE ONE FARTHEST FROM THE MOLD BEING PROVIDED WITH A PLURALITY OF PERFORATIONS, HEAT SOFENTING SAID THERMOPLASTIC MATERIAL AND REDUCING THE PRESSURE WITHIN THE MOLD BOX TO LESS THAN ATMOSPHERIC PRESSURE TO DRAW AIR FROM BETWEEN THE SHEETS AND TO DRAW THE SHEETS INTO ENGAGEMENT WITH THE MOLD.
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |