Patent US3694622A successfully refreshed from Google Patents.
Patent US2715583A successfully refreshed from Google Patents.
US2715583A
Expired / Lapsed
US
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Aggregate composition of granulated slag and expanded vermiculite
Assignee: Zonolite Co
•
Filing: 1952-12-03
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Granted: 1955-08-16
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Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 George E Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A GYPSUM PLASTER CONSISTING ESSENTIALLY OF ABOUT 2 1/2 CUBIC FEET OF AGGREGATE PER 100 POUNDS OF GYPSUM PLASTER BINDER, SAID AGGREGATE CONSISTING ESSENTIALLY OF FROM 20 TO 60% BY VOLUME OF A GRANULATED CELLULAR FURNACE SLAG HAVING DRY DENSITY OF BETWEEN 12 AND 40 POUNDS PER CUBIC FOOT AND FROM 80 TO 40% BY VOLUME OF EXPANDED VERMICULITE HAVING A DRY DENSITY OF LESS THAN ABOUT 15 POUNDS PER CUBIC FOOT.
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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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |