US2526538A
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
2026-11-04 13:59
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/20; C04B2111/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 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 ABOT ONE PART TO ABOUT TEN PARTS OF ASPHALT PER EACH PART OF WAX AND A SMALL AMOUNT, NOT EXCEEDING ABOIUT 2% OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH ALUMINATES AND PORTLAND CEMENT SUFFICIENT MARKEDLY TO INCREASE THE WATER-RESISTANCE OF THE PRODUCT AS COMPARED WITH ONE DEVOID OF SAID SUBSTANCE.
Claim 2
Dependent Claim
92 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 ABOT ONE PART TO ABOUT TEN PARTS OF ASPHALT PER EACH PART OF WAX AND A SMALL AMOUNT, NOT EXCEEDING ABOIUT 2% OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH ALUMINATES AND PORTLAND CEMENT SUFFICIENT MARKEDLY TO INCREASE THE WATER-RESISTANCE OF THE PRODUCT AS COMPARED WITH ONE DEVOID OF SAID SUBSTANCE.
References Cited (Backward Citations)
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US2078200A
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US2212811A
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US2340840A
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US2291905A
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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) | 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 |