Patent US3605848A successfully refreshed from Google Patents.
US3605848A
Expired / Lapsed
US
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Microcellular urethane elastomers of relatively low density
Assignee: Inter Polymer Corp
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Filing: 1968-12-23
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Granted: 1971-09-20
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Expires: 1988-12-23
Abstract
Abstract A BULLET PROOF VEHICLE TIRE HAVING A PERIPHERAL COATING OF SOLID POLYURETHANE ELASTOMERS AND A CORE OF PREDOMINANTLY OPEN-CELLED MICROCELLULAR POLYURETHANE ELASTOMERS HAVING A DENSITY OF FROM ABOUT 6 TO ABOUT 25 PUNDS PER CUBIC FOOT PRODUCED BY THE REACTION OF (A) A POLYOL CON- TAINING AT LEAST ABOUT 35% OF SECONDARY HYDROXYL ENDGROUPS, (B) AN ORGANIC POLYISOCYANATE, (C) A SURFACTANT, (D) A FOAMING AGENT, AND (E) A CATALYST.
Inventors
- 👤 Frank G Lombardi
- 👤 Fritz Hostettler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/34; B; B60; B60C; B60C7/00; B60C7/10; B60C7/101; B60C7/1015; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4291; C08G18/48; C08G18/4854; C08G18/65; C08G18/66; C08G18/6603; C08G18/6607; C08G18/6611; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0058; C08G2110/0066; C08G2380/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10T; Y10T152/00; Y10T152/10; Y10T152/10279; Y10T152/10378; Y10T152/10387; Y10T152/10396; Y10T152/10405
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |