US3761231A
Expired / Lapsed
US
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Composite articles
Assignee: Dunlop Co Ltd
•
Filing: 1970-12-31
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Granted: 1973-09-25
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Expires: 1990-12-31
Abstract
Abstract A COMPOSITE ARTICLE FOR USE, FOR EXAMPLE, AS A FUNCTIONAL BLOCK COMPRISING A BLOCK OF NON-METALLIC MATERIAL HAVING EMBEDDED THEREIN A LAYER OF POROUS MATERIAL IN THE FORM OF A THREE-DIMENSIONAL NETWORK ARRANGED SO AS TO DEFINE A PLURALITY OF INTERCOMMUNICATING CELLULAR SPACES, THE SAID LAYER EXTENDING ADJACENT ONE SURFACE OF THE BLOCK BUT NOT WHOLLY THERETHROUGH.
Inventors
- 👤 F Dowell
- 👤 R Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 00:51
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/125; F16D65/122; F16D69/00; F16D69/02; F16D69/027; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12451; Y10T428/12458; Y10T428/12479; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/24; Y10T428/24273; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249961; Y10T428/30
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |