Patent US2582852A successfully refreshed from Google Patents.
US2582852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cellular glass of light color
Assignee: Pittsburgh Corning LLC
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Filing: 1948-06-16
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Granted: 1952-01-15
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Expires: 1968-06-16
Abstract
No abstract record available.
Inventors
- 👤 Montgomery J Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:45
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS OF PREPARING A LIGHT-COLORED CELLULATED GLASS WHICH COMPRISES HEATING A MIXTURE OF FINELY PULVERIZED SUITABLE GLASS CONTAINING 3 TO 15% BY WEIGHT OF FERRIC OXIDE AND PULVERULENT CARBON TO TEMPERATURES OF 1500* F. TO 1800* F. FOR SINTERING AND CELLULATING THE MIXTURE.
Claim 2
Dependent Claim
44 words
A PROCESS OF PREPARING A LIGHT-COLORED CELLULATED GLASS WHICH COMPRISES HEATING A MIXTURE OF FINELY PULVERIZED SUITABLE GLASS CONTAINING 3 TO 15% BY WEIGHT OF FERRIC OXIDE AND PULVERULENT CARBON TO TEMPERATURES OF 1500* F. TO 1800* F. FOR SINTERING AND CELLULATING THE MIXTURE.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |