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Patent US3725185A successfully refreshed from Google Patents.
US3725185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected structural and construction materials
Assignee: INTERNATIONAL PERMALITE CORP
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Filing: 1970-07-16
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Granted: 1973-04-03
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Expires: 1990-07-16
Abstract
Abstract IN VARIOUS PROTECTIVE ASSEMBLIES OR SYSTEMS FOR STRUCTURAL AND CONSTRUCTION MATERIALS, A WATER RESISTANT SHEET HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 1/1000 TO ABOUT 3/8 INCH AND BEINGG COMPOSED OF FROM 50 TO 100 WT. PERCENT UNCURED RUBBER RECLAIM, AND FROM 0 TO ABOUT 50 WT. PERCENT BITUMINOUS MATERIAL. SPECIFIC PROTECTIVE ASSEMBLIES OR SYSTEMS ARE DESCRIBED AND CLAIMED. D R A W I N G
Inventors
- 👤 F Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:18
CPC Classifications
B; B32; B32B; B32B13/00; B32B13/04; B32B13/042; E; E02; E02D; E02D31/00; E02D31/02; B32B11/00; B32B11/04; B32B11/044; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04D; E04D11/00; E04D11/02; H; H01; H01K; H01K3/00; B32B2395/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/133; Y10T442/145; Y10T442/162
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |