Patent US3950462A successfully refreshed from Google Patents.
US3950462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a resilient storage insert
Assignee: United States Department of the Navy
•
Filing: 1975-06-19
•
Granted: 1976-04-13
•
Expires: 1995-06-19
Abstract
Abstract A method of making a resilient storage insert for holding fragile compone comprising the steps of first vacuum forming a sheet of flexible acrylonitrile butadiene styrene in a male die and then placing said vacuum-formed sheet in a female die, then filling the underside of said vacuum-formed sheet with polyurethane foam material and then curing said polyurethane foam material.
Inventors
- 👤 Clifford K. Shaffer
- 👤 Joe B. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:28
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/107; B65D81/113; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A method for making a resilient storage insert comprising, die forming a sheet of rigid plastic material into a rigid container and then using the same die to form a sheet of flexible plastic material into a shape similar to said rigid container, then positioning said sheet of flexible plastic material into said rigid container to provide a container of flexible plastic material, then filling said container of flexible plastic material with a liquid foam material and curing said liquid foam material into a solid material which is the underside of a resilient storage insert, and then removing said resilient storage insert from said rigid container.
Claim 2
Independent Claim
106 words
A method for making a resilient storage insert comprising, die forming a sheet of rigid plastic material into a rigid container and then using the same die to form a sheet of flexible plastic material into a shape similar to said rigid container, then positioning said sheet of flexible plastic material into said rigid container to provide a container of flexible plastic material, then filling said container of flexible plastic material with a liquid foam material and curing said liquid foam material into a solid material which is the underside of a resilient storage insert, and then removing said resilient storage insert from said rigid container.
Claim 3
Dependent Claim
40 words
A method for making a resilient storage insert as set forth in claim 1 wherein said sheet of rigid plastic material is rigid acrylonitrile butadiene styrene and is heated to a temperature between 280° and 300° F. prior to forming.
Claim 4
Dependent Claim
40 words
A method for making a resilient storage insert as set forth in claim 1 wherein said sheet of flexible plastic material is flexible acrylonitrile butadiene styrene and is heated to a temperature between 280° and 300° F. prior to forming.
Claim 5
Dependent Claim
63 words
A method for making a resilient storage insert as set forth in claim 1 wherein said sheet of rigid plastic material is rigid acrylonitrile butadiene styrene and is heated to a temperature between 280° and 300° F. prior to forming and said sheet of flexible plastic material is flexible acrylonitrile butadiene styrene and is heated to a temperature between 280° and 300° F.
Claim 6
Dependent Claim
25 words
A method for making a resilient storage insert as set forth in claim 1 wherein said liquid foam material is a two-component polyurethane foam-in-place system.
References Cited (Backward Citations)
US2948651A
Cited
US3390214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |