US3723146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarded gypsum plaster for use in long set aggregate mortar applications
Assignee: United States Gypsum Co
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Filing: 1971-08-12
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Granted: 1973-03-27
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Expires: 1991-08-12
Abstract
Abstract THE PROCESS OF MAKING A GYPSUM PLASTER POSSESSING A HIGH DEGREE OF STABLITY OVER EXTENDED PERIODS OF TIME AND HAVING A SET TIME OF AT LEAST 4 HOURS IN AGGREGATED MORTAR APPLICATION BY PROVIDING A SPECIALLY SIZED GYPSUM GYPSUM HAVING A PARTICLE SIZE THAT IS ESSENTIALLY SIEZED GYPSUM THAN 32 MICRONS, AND MIXING SAID SPECIALLY SIZED GYPSUM WITH RETARDER, ACCELERATOR AND OTHER ADDITIVES TO GIVE THE DESIRED PROPERTIES WHEN MIXED WITH WATER AND AGGREGATE.
Inventors
- 👤 M Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:28
CPC Classifications
C; C04; C04B; C04B11/00
Claims Analysis
Total Claims: 0
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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) | 1976-03-26 | 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 |