US3072520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-forming of a laminated article having a resilient central layer
Assignee: Individual
•
Filing: 1959-01-20
•
Granted: 1963-01-08
•
Expires: 1979-01-20
Abstract
No abstract record available.
Inventors
- 👤 Fred A Groth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1464; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/1312; B29C66/20; B29C66/21; B29C66/304; B29C66/45; B32; B32B; B32B27/00; B29C51/00; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1052; Y10T156/1056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A PROCESS FOR PRODUCING A LAMINATED ARTICLE COMPRISING FORMING A FACE SHEET INTO DESIRED CONFIGURATION HAVING A PLURALITY OF PROJECTIONS FORMED ON ONE SURFACE THEREOF AND NON-PROJECTING PORTIONS INTERPOSED THEREBETWEEN, APPLYING AN INTERMEDIATE LAYER TO THE SURFACE OF SAID FACE SHEET HAVING PROJECTIONS FORMED THEREIN, SAID INTERMEDIATE LAYER HAVING APERTURES FORMED THEREIN WHEREBY SAID FACE SHEET PROJECTIONS MAY PASS THERETHROUGH AND SAID LAYER MAY REST ON SAID FACE SHEET NON-PROJECTING PORTIONS, AND SEALINGLY APPLYING A BACKING SHEET TO SAID INTERMEDIATE LAYER EXPOSED SURFACE BY WITHDRAWING ATMOSPHERE FROM BETWEEN SAID FACE SHEET AND BACKING SHEET SO AS TO EFFECT A PRESSURE BETWEEN SAID SHEETS WHICH IS LESS THAN THE PRESSURE EXISTING ON THE EXTERIOR OF SAID SHEETS, WHEREBY SAID INTERMEDIATE LAYER IS UNIFORMLY COMPRESSED AGAINST SAID FACE SHEET, AND SAID BACKING SHEET IS SEALED TO ENGAGED PORTIONS OF SAID INTERMEDIATE LAYER AND SAID FACE SHEET.
Claim 2
Dependent Claim
144 words
A PROCESS FOR PRODUCING A LAMINATED ARTICLE COMPRISING FORMING A FACE SHEET INTO DESIRED CONFIGURATION HAVING A PLURALITY OF PROJECTIONS FORMED ON ONE SURFACE THEREOF AND NON-PROJECTING PORTIONS INTERPOSED THEREBETWEEN, APPLYING AN INTERMEDIATE LAYER TO THE SURFACE OF SAID FACE SHEET HAVING PROJECTIONS FORMED THEREIN, SAID INTERMEDIATE LAYER HAVING APERTURES FORMED THEREIN WHEREBY SAID FACE SHEET PROJECTIONS MAY PASS THERETHROUGH AND SAID LAYER MAY REST ON SAID FACE SHEET NON-PROJECTING PORTIONS, AND SEALINGLY APPLYING A BACKING SHEET TO SAID INTERMEDIATE LAYER EXPOSED SURFACE BY WITHDRAWING ATMOSPHERE FROM BETWEEN SAID FACE SHEET AND BACKING SHEET SO AS TO EFFECT A PRESSURE BETWEEN SAID SHEETS WHICH IS LESS THAN THE PRESSURE EXISTING ON THE EXTERIOR OF SAID SHEETS, WHEREBY SAID INTERMEDIATE LAYER IS UNIFORMLY COMPRESSED AGAINST SAID FACE SHEET, AND SAID BACKING SHEET IS SEALED TO ENGAGED PORTIONS OF SAID INTERMEDIATE LAYER AND SAID FACE SHEET.
References Cited (Backward Citations)
US1908682A
Cited
US2670501A
Cited
GB752719A
Cited
US2781820A
Cited
US2745212A
Cited
US2978376A
Cited
US2861405A
Cited
US2888787A
Cited
US2991600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |