US3778281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusion bonded vermiculite molding material
Assignee: WR Grace and Co
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Filing: 1971-12-16
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Granted: 1973-12-11
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Expires: 1991-12-16
Abstract
Abstract FUSION BONDED VERMICULITE MOLDING MATERIAL PREPARED FROM VERMICULITE, SODIUM BOARATE, SODIUM METAPHOSPHATE AND CLAY IS USED TO PREPARE A VARIETY OF MATERIALS AND STRUCTURES INCLUDING, AMONG OTHERS, A STRONG, LIGHTWEIGHT DECORATIVE FIRE RESISTANT BOARD, A SUPERIOR FOUNDRY MOLD AND A LIGHTWEIGHT SYNTHETIC AGGREGATE.
Inventors
- 👤 P Brown
- 👤 H Duecker
- 👤 D Devore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:01
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B38/00; C04B38/08; Y; Y10; Y10S; Y10S106/00; Y10S106/03
Claims Analysis
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |