Patent US2724260A successfully refreshed from Google Patents.
US2724260A
Expired / Lapsed
US
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Glass block with mortar repellent coating
Assignee: Pittsburgh Corning LLC
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Filing: 1952-12-06
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Granted: 1955-11-22
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 D Eustachio Dominic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:49
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/42; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A GLASS BUILDING BLOCK HAVING ITS OPPOSITE EXTERIOR FACES COVERED WITH A TRANSPARENT ORGANOPOLYSILOXANE RESINOUS FILM WITH THE MARGINAL EDGE SURFACES THEREBE-
Claim 2
Dependent Claim
22 words
A GLASS BUILDING BLOCK HAVING ITS OPPOSITE EXTERIOR FACES COVERED WITH A TRANSPARENT ORGANOPOLYSILOXANE RESINOUS FILM WITH THE MARGINAL EDGE SURFACES THEREBE-
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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) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |