US2715583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aggregate composition of granulated slag and expanded vermiculite
Assignee: Zonolite Co
•
Filing: 1952-12-03
•
Granted: 1955-08-16
•
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 21:11
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.
References Cited (Backward Citations)
US1226292A
Cited
US1912544A
Cited
US1916971A
Cited
US1991393A
Cited
GB409530A
Cited
US1976946A
Cited
US2007130A
Cited
US2226348A
Cited
US2342574A
Cited
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 |