Patent US3598672A successfully refreshed from Google Patents.
US3598672A
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Method of producing shaped bodies of low specific gravity
Assignee: Rheinmetall Air Defence AG
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Filing: 1968-08-13
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Granted: 1971-08-10
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Expires: 1988-08-13
Abstract
Abstract BODIES OF LOW SPECIFIC GRAVITY PRODUCED BY COATING A MASS OF ROUNDISH HOLLOW GRANULES, SUCH AS EXPANDED OR SWELLED POLYSTYRENE GRANULES, WITH A HARDENABLE LIQUID BINDER MATERIAL, MIXING THE MASS OF THUS COATED GRANULES WITH A PULVERULENT SOLID AND/OR FIBROUS MATERIAL SO AS TO ADHERE PARTICLES OF THE SOLID AND/OR FIBROUS MATERIAL TO THE COATING, AND HARDENING THE HARDENABLE BINDER COATING, AND SHAPED CELLULAR STRUCTURES FORMED BY COMPRESSING THE MASS OF HARDENABLE BINDER COATED HOLLOW GRANULES HAVING PULVERULENT AND/OR FIBROUS MATERIAL ADHERING TO THE COATING DURING OR PRIOR TO THE HARDENING OF THE HARDENABLE LIQUID BINDER MATERIAL.
Inventors
- 👤 Rudolf Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:05
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C67/00; B29C67/20; B29C67/207; B29C70/00; C; C04; C04B; C04B20/00; C04B20/10; C04B20/12; C04B26/00; C04B26/02; C04B26/10; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/236; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; B29K; B29K2105/00; B29K2105/06; B29K2309/00; B29K2309/08; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249986; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/2982; Y10T428/2991; Y10T428/2998
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) | 1974-08-09 | 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 |