US2593008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed gypsum composition
Assignee: Hercules Powder Co
•
Filing: 1950-04-13
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Granted: 1952-04-15
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Expires: 1970-04-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred L Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/02; C04B24/04; C04B24/24; C04B24/34; C04B28/00; C04B28/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A FOAMING GYPSUM COMPOSITION COMPRISING AN AQUEOUS SUSPENSION OF CALCINED GYPSUM CONTAINING A FRACTION OF 1% OF A BLEND OF AN ALKALI METAL SOAP OF A PARTIALLY GASOLINE-INSOLUBLE PINE WOOD RESIN AND A WATER-SOLUBLE LOWER ALCOHOL HAVING 3 TO 6 CARBON ATOMS, HAVING A RATIO OF HYDROXYL GROUPS TO CARBON ATOMS UP TO BUT NOT IN EXCESS OF 1 HYDROXYL GROUP PER 3 CARBON ATOMS, AND HAVING A TOTAL OXYGEN CONTENT BELOW 40%.
Claim 2
Dependent Claim
73 words
A FOAMING GYPSUM COMPOSITION COMPRISING AN AQUEOUS SUSPENSION OF CALCINED GYPSUM CONTAINING A FRACTION OF 1% OF A BLEND OF AN ALKALI METAL SOAP OF A PARTIALLY GASOLINE-INSOLUBLE PINE WOOD RESIN AND A WATER-SOLUBLE LOWER ALCOHOL HAVING 3 TO 6 CARBON ATOMS, HAVING A RATIO OF HYDROXYL GROUPS TO CARBON ATOMS UP TO BUT NOT IN EXCESS OF 1 HYDROXYL GROUP PER 3 CARBON ATOMS, AND HAVING A TOTAL OXYGEN CONTENT BELOW 40%.
References Cited (Backward Citations)
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Cited
GB350538A
Cited
US2089813A
Cited
US2207339A
Cited
US2360518A
Cited
US2364555A
Cited
US2371688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |