Patent US2751775A successfully refreshed from Google Patents.
US2751775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masonry block having an integral molded facing layer and method of making same
Assignee: Burns and Russell Co
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Filing: 1955-07-12
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Granted: 1956-06-26
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Expires: 1975-07-12
Abstract
No abstract record available.
Inventors
- 👤 John A Sergovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:07
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C67/242; B29C67/243; B29C67/244; B28; B28B; B28B11/00; B28B11/04; E; E04; E04C; E04C1/00; E04C1/40; B29L; B29L2031/00; B29L2031/10; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/0286; Y; Y10; Y10S; Y10S52/00; Y10S52/07; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A MASONRY BLOCK HAVING AN INTEGRAL MOLDED FACING LAYER OF A COMPOSITION COMPRISING THE REACTION PRODUCT OF AN ETHYLENICALLY UNSATURATED ALKYD RESIN AND A POLYMERIZABLE VINYL MONOMER AND SAND AS A FILLER, THE LATTER BEING IN AN AMOUNT OF AT LEAST FIFTY PERCENT AND NOT OVER 90% OF THE TOTAL OF THE RESIN, MONOMER AND FILLER BY WEIGHT, THE COMPOSITION OF SAID FACING LAYER PERMEATING THE ADJACENT SURFACE OF SAID BLOCK, SAID COMPOSITION BEING CURED TO PERMANENTLY INTERLOCK SAID FACING LAYER AND BLOCK AND TO FORM A FACING LAYER HAVING A HARD, ABRASION RESISTANT SURFACE SUBSTANTIALLY FREE OF PITS AND PINHOLES AND POSSESSING ELASTICITY ENABLING THE LAYER TO BE RESISTANT TO PEELING, CRAZING AND CRACKING DUE TO BLOWS AND TO DIFFERENCES IN COEFFICIENTS OF EXPANSION AND CONTRACTION BETWEEN THE SAID BLOCK AND THE SAID FACING THEREON.
Claim 2
Dependent Claim
136 words
A MASONRY BLOCK HAVING AN INTEGRAL MOLDED FACING LAYER OF A COMPOSITION COMPRISING THE REACTION PRODUCT OF AN ETHYLENICALLY UNSATURATED ALKYD RESIN AND A POLYMERIZABLE VINYL MONOMER AND SAND AS A FILLER, THE LATTER BEING IN AN AMOUNT OF AT LEAST FIFTY PERCENT AND NOT OVER 90% OF THE TOTAL OF THE RESIN, MONOMER AND FILLER BY WEIGHT, THE COMPOSITION OF SAID FACING LAYER PERMEATING THE ADJACENT SURFACE OF SAID BLOCK, SAID COMPOSITION BEING CURED TO PERMANENTLY INTERLOCK SAID FACING LAYER AND BLOCK AND TO FORM A FACING LAYER HAVING A HARD, ABRASION RESISTANT SURFACE SUBSTANTIALLY FREE OF PITS AND PINHOLES AND POSSESSING ELASTICITY ENABLING THE LAYER TO BE RESISTANT TO PEELING, CRAZING AND CRACKING DUE TO BLOWS AND TO DIFFERENCES IN COEFFICIENTS OF EXPANSION AND CONTRACTION BETWEEN THE SAID BLOCK AND THE SAID FACING THEREON.
References Cited (Backward Citations)
US461890A
Cited
US833455A
Cited
US909792A
Cited
US939966A
Cited
US1162172A
Cited
US1516890A
Cited
US1899137A
Cited
US2193635A
Cited
US2294556A
Cited
US2392551A
Cited
US2444532A
Cited
US2537520A
Cited
US2601532A
Cited
US2667664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |