Patent US3723232A successfully refreshed from Google Patents.
US3723232A
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Bdies of low specific gravity
Assignee: Individual
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Filing: 1971-02-16
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Granted: 1973-03-27
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Expires: 1991-02-16
Abstract
Abstract BODIES OF LOW SPECIFIC GRAVITY ARE 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 MATERIAL SO AS TO ADHERE PARTICLES OF THE SOLID MATERIAL TO THE COATING, AND HARDENING THE HARDENABLE BINDER COATING. SHAPED CELLULAR STRUCTURES ARE FORMED FROM THE MASS OF HARDENABLE BINDER-COATED HOLLOW GRANULES HAVING PULVERULENT MATERIAL ADHERING TO THE COATING, BY COMPRESSING THE MASS DURING OR PRIOR TO THE HARDENING OF THE HARDENABLE LIQUID BINDER MATERIAL.
Inventors
- 👤 R Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:09
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
Total Claims: 0
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |