US4279680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for forming thinwall structures
Assignee: Individual
•
Filing: 1978-07-28
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Granted: 1981-07-21
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Expires: 1998-07-28
Abstract
Abstract This invention concerns a method for forming thinwall structures from fiberglass, ferrocement or similiar materials in shapes that are inherently optimum in cost-strength effectiveness. Reinforcing means are hung from elevated points forming a catenary surface and then saturated with a post setting material. The structure is inverted after it is stable onto mirror image supports causing its elements to be in compression with negligible bending or tensile stresses.
Inventors
- 👤 Louis L. Watson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:31
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; E04B1/16; E04B1/164; E04B7/00; E04B7/08; E04B7/10; E04B7/102; B29L; B29L2031/00; B29L2031/10; E04B2001/3258; E04B2001/3264; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
The method of forming a thinwall structure which comprises constructing elevated supports, hanging closely spaced reinforcing means between said supports in essentially a catenary surface, stabilizing the reinforcing means by saturating and enveloping them with resinous or cementitious material which is allowed to harden and finally inverting the structure onto mirror image supports causing its elements to be in compression with negligible bending or tensile stresses.
Claim 2
Independent Claim
66 words
The method of forming a thinwall structure which comprises constructing elevated supports, hanging closely spaced reinforcing means between said supports in essentially a catenary surface, stabilizing the reinforcing means by saturating and enveloping them with resinous or cementitious material which is allowed to harden and finally inverting the structure onto mirror image supports causing its elements to be in compression with negligible bending or tensile stresses.
Claim 3
Independent Claim
85 words
The method of forming a thinwall structure adapted to function as a mold which comprises constructing elevated supports, hanging closely spaced reinforcing means between said supports in essentially a catenary surface, stabilizing the reinforcing means by saturating and enveloping them with resinous or cementitious material which is allowed to harden, laminating additional reinforcing materials to the outside surface of the stabilized reinforcing means, and finally inverting said structure onto mirror image supports causing its elements to be in compression with negligible bending or tensile stresses.
Claim 4
Independent Claim
85 words
The method of forming a thinwall structure adapted to function as a mold which comprises constructing elevated supports, hanging closely spaced reinforcing means between said supports in essentially a catenary surface, stabilizing the reinforcing means by saturating and enveloping them with resinous or cementitious material which is allowed to harden, laminating additional reinforcing materials to the outside surface of the stabilized reinforcing means, and finally inverting said structure onto mirror image supports causing its elements to be in compression with negligible bending or tensile stresses.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |