Patent US3598688A successfully refreshed from Google Patents.
US3598688A
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US
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Vented roof systems employing microporous membranes
Assignee: SB Decking Inc
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Filing: 1968-08-26
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Granted: 1971-08-10
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Expires: 1988-08-26
Abstract
Abstract TRAFFIC BEARING AND NONTRAFFIC BEARING ROOF SYSTEMS COMPRISING A SUBSTANTIALLY VAPOR IMPERMEABLE STRUCTURAL SUBSTRATE AND A WATERPROOF, SUBSTANTIALLY VAPOR IMPERMEABLE PROTECTIVE TOP LAYER VENTED WITH A MICROPOROUS MEMBRANE TO RELIEVE VAPOR PRESSURE FROM WITHIN THE SYSTEM THEREBY PREVENTING BLISTERING, CRACKING AND EVENTUAL DESTRUCTION OF THE WEATHERPROOF PROTECTIVE TOP LAYER.
Inventors
- 👤 Robert G Bellamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:20
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/12; E04D13/00; E04D13/17; Y; Y10; Y10T; Y10T428/00; Y10T428/22; Y10T428/249921; Y10T428/249953; Y10T428/249978
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |