US2526537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant gypsum products and method of making
Assignee: United States Gypsum Co
•
Filing: 1946-11-16
•
Granted: 1950-10-17
•
Expires: 1966-11-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:04
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/20; C04B2111/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A WATER RESISTANT GYPSUM PRODUCT COMPRISING A SET MASS OF INTERLACED GYPSUM CRYSTALS CONTAINING FROM ABOUT 2% TO ABOUT 15% OF A THEREIN DEPOSITED MIXTURE OF ASPHALT AND PARAFFIN WAX IN THE RELATIVE PROPORTIONS OF FROM ABUT ONE PART TO ABOUT TEN PARTS OF ASPHALT PER EACH PART OF WAX, AND FROM ABOUT 0.1% TO ABOUT 0.8% OF POTASSIUM SULFATE.
Claim 2
Dependent Claim
60 words
A WATER RESISTANT GYPSUM PRODUCT COMPRISING A SET MASS OF INTERLACED GYPSUM CRYSTALS CONTAINING FROM ABOUT 2% TO ABOUT 15% OF A THEREIN DEPOSITED MIXTURE OF ASPHALT AND PARAFFIN WAX IN THE RELATIVE PROPORTIONS OF FROM ABUT ONE PART TO ABOUT TEN PARTS OF ASPHALT PER EACH PART OF WAX, AND FROM ABOUT 0.1% TO ABOUT 0.8% OF POTASSIUM SULFATE.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |