US3726951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing walled structures from foamable thermosetting synthetic resinous material
Assignee: Dow Chemical Co
•
Filing: 1970-06-11
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Granted: 1973-04-10
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Expires: 1990-06-11
Abstract
Abstract Walled structures are prepared of foam-in-place plastic material employing a depositing head having a pair of opposed side forming belts on top of the forming belts which are driven at a predetermined rate. Foamable material is passed to the channel formed by the belts as the depositing or foaming head progresses about the structure.
Inventors
- 👤 H Smith
- 👤 D Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B1/35; E04B2001/3217; E04B2001/3229; E04B2001/3258; E04B2001/3264; Y; Y10; Y10S; Y10S425/00; Y10S425/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The method of claim 1 including the step of restraining the thermosetting foamable hardenable material within a heated configuration.
Claim 2
Dependent Claim
16 words
The method of claim 1 wherein the thermosetting foamable hardenable material is a polyurethane resin composition.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the thermosetting foam-able hardenable material is a phenolic resin composition.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the material is an epoxy resin composition.
Claim 5
Dependent Claim
28 words
The method of claim 1 including the step of confining the thermosetting foamable hardenable liquid resin on at least one surface by means of an adherent reinforcing web.
Claim 6
Dependent Claim
13 words
The method of claim 6 wherein the rein-forcing web is a perforate web.
Claim 7
Dependent Claim
41 words
The method of claim 1 including the step of applying a reinforcing skin to at least one surface of the structure as it is being fabricated and adhering the skin to the structure and to an adjacent skin in overlapping relationship.
Claim 8
Dependent Claim
28 words
The method of claim 1 wherein the thermosetting foam-able hardenable material is confined by endless belts forming an enclosed channel in combination with a previously deposited foamed strip.
Claim 9
Dependent Claim
32 words
The method of claim 1 wherein the material is selected from the group consisting of foamable epoxy resin, foamable phenolformaldehyde resin and foamable urethane resin, foamable polyesters and foamable chloromethylated diphenyloxide compositions.
References Cited (Backward Citations)
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US3172925A
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US3383257A
Cited
US3442992A
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |