US2523646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for the correction of surface irregularities and method of preparing the same
Assignee: National Gypsum Co
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Filing: 1947-01-15
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Granted: 1950-09-26
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Expires: 1967-01-15
Abstract
No abstract record available.
Inventors
- 👤 John W Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A DRY, POWDERED COMPOSITION FOR THE CORRECTION OF SURFACE IRREGULARITIES AND ADAPTED TO BE RENDERED PLASTIC BY THE ADDITION OF WATER AND HARDEN UPON DRYING WITHOUT SUBSTANTIAL SAGGING OR SHRINKING, CONSISTING ESSENTIALLY OF ABOUT 160 PARTS BY WEIGHT OF DRY PARTICLES OF CALCINED GYPSUM ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, ABOUT 240 PARTS BY WEIGHT OF DRY PARTICLES OF FILLER ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, ABOUT 16 PARTS BY WEIGHT OF DRY PARTICLES OF HIDE GLUE ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, AND ABOUT 1 PART BY WEIGHT OF DRY PARTICLES OF ACCELERATING AT LEAST 95% OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, SAID PARTICLES BEING SUBSTANTIALLY SEPARATE AND PHYSICALLY UNCOMBINED WITH ONE ANOTHER AND UNIFORMLY DISPERSED THROUGHOUT SAID COMPOSITION.
Claim 2
Dependent Claim
143 words
A DRY, POWDERED COMPOSITION FOR THE CORRECTION OF SURFACE IRREGULARITIES AND ADAPTED TO BE RENDERED PLASTIC BY THE ADDITION OF WATER AND HARDEN UPON DRYING WITHOUT SUBSTANTIAL SAGGING OR SHRINKING, CONSISTING ESSENTIALLY OF ABOUT 160 PARTS BY WEIGHT OF DRY PARTICLES OF CALCINED GYPSUM ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, ABOUT 240 PARTS BY WEIGHT OF DRY PARTICLES OF FILLER ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, ABOUT 16 PARTS BY WEIGHT OF DRY PARTICLES OF HIDE GLUE ALL OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, AND ABOUT 1 PART BY WEIGHT OF DRY PARTICLES OF ACCELERATING AT LEAST 95% OF WHICH ARE CAPABLE OF PASSING THROUGH A 100 MESH SCREEN, SAID PARTICLES BEING SUBSTANTIALLY SEPARATE AND PHYSICALLY UNCOMBINED WITH ONE ANOTHER AND UNIFORMLY DISPERSED THROUGHOUT SAID COMPOSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |