Patent US3607592A successfully refreshed from Google Patents.
US3607592A
Expired / Lapsed
US
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Portable platforms
Assignee: Dunlop Rubber Co Ltd
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Filing: 1969-12-18
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Granted: 1971-09-21
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Expires: 1989-12-18
Abstract
Abstract Portable platform for use, for example, as a temporary road, comprising a flexible plastic material in which is embedded a composite reinforcement comprising two layers of parallel transverse metal cords and sandwiched between the two layers a layer of textile reinforcement and a layer of longitudinal parallel metal cords, the layer of longitudinal cords lying between the textile reinforcement and the load-bearing surface of the platform so that ''''one way'''' longitudinal rigidity is achieved.
Inventors
- 👤 Peter J Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:02
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/18; E01C9/00; E01C9/08; E01C9/086; E01D; E01D15/00; E01D15/12; E01D15/122; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/24107; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T442/00; Y10T442/30; Y10T442/3382
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A platform according to claim 1 wherein the metal cords are steel cords.
Claim 2
Dependent Claim
18 words
A platform according to claim 1 wherein the polymeric material is a vulcanized natural or synthetic rubber composition.
Claim 3
Dependent Claim
15 words
A platform according to claim 1 wherein the polymeric material is a synthetic resin composition.
Claim 4
Dependent Claim
17 words
A platform according to claim 4 wherein the synthetic resin composition is a plasticized polyvinyl chloride composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |