US2618959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural glass article
Assignee: Libbey Owens Ford Glass Co
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Filing: 1948-04-24
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Granted: 1952-11-25
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Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 George B Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:28
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/0269
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A BUILDING BLOCK COMPRISING, A CEMENTITIOUS BODY PORTION, A STRUCTURAL GLASS FACE PLATE COVERING ONE SURFACE OF SAID BODY PORTION, AND A LAYER OF A SUBSTANTIALLY SOLVENT FREE MIXTURE INCLUDING ESSENTIALLY 55 TO 60% OF A PARTIALLY POLY-
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) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |