US3984266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding a ferro-cement structure with fiberglass reinforced plastic
Assignee: United States Department of the Navy
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Filing: 1974-04-22
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Granted: 1976-10-05
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Expires: 1994-04-22
Abstract
Abstract A process for bonding a glass fiber reinforced plastic to a ferro-cement structure to improve impact strength of the ferro-cement structure comprising the steps curing the ferro-cement mortar; acid etching the mortar on the side of the ferro-cement mortar to which the glass fiber reinforced plastic is to be bonded, rinsing the mortar, drying the mortar, applying a coat of adhesive to the mortar and attaching the glass fiber reinforced plastic to the bonded mortar surface. The adhesive may be partially cured if desired.
Inventors
- 👤 Kenneth A. Christensen
- 👤 Robert B. Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:15
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/04; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; Y; Y10; Y10S; Y10S52/00; Y10S52/07; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109; Y10T442/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A method for making an impact resistant structural material comprising the steps of: a. pouring Portland cement mortar into a mold in which a plurality of layers of steel mesh are positioned with steel bars sandwiched in-between, wherein said layers of steel mesh and said sandwiched steel bars are positioned before said mortar has hardened, to form a ferro-cement structure having a thickness of from about one-half inch to about one and one-half inches and having first and second about parallel sides; b. curing said ferro-cement structure; c. etching said mortar on said first side with an about 15% solution of hydrochloric acid; d. rinsing said first side with water until said hydrochloric acid solution is removed therefrom; e. allowing said first side to thoroughly dry; f. applying a coat of epoxy resin to said first side; g. allowing said epoxy resin to partially cure; h. applying a thickness of glass fiber reinforced plastic to said partially cured epoxy resin; and i. allowing said epoxy resin to completely cure.
Claim 2
Independent Claim
169 words
A method for making an impact resistant structural material comprising the steps of: a. pouring Portland cement mortar into a mold in which a plurality of layers of steel mesh are positioned with steel bars sandwiched in-between, wherein said layers of steel mesh and said sandwiched steel bars are positioned before said mortar has hardened, to form a ferro-cement structure having a thickness of from about one-half inch to about one and one-half inches and having first and second about parallel sides; b. curing said ferro-cement structure; c. etching said mortar on said first side with an about 15% solution of hydrochloric acid; d. rinsing said first side with water until said hydrochloric acid solution is removed therefrom; e. allowing said first side to thoroughly dry; f. applying a coat of epoxy resin to said first side; g. allowing said epoxy resin to partially cure; h. applying a thickness of glass fiber reinforced plastic to said partially cured epoxy resin; and i. allowing said epoxy resin to completely cure.
References Cited (Backward Citations)
US716371A
Cited
US1452432A
Cited
US2850890A
Cited
US2921463A
Cited
US2752275A
Cited
US3145502A
Cited
US3177902A
Cited
US3146508A
Cited
US3055073A
Cited
US3202560A
Cited
US3210230A
Cited
US3381718A
Cited
US3401069A
Cited
US3468090A
Cited
US3591437A
Cited
US3811909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |