US2596659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cellular glass having intercommunicating cells
Assignee: Pittsburgh Corning LLC
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Filing: 1949-05-13
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Granted: 1952-05-13
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Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 D Eustachio Dominic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF TREATING AN ANNEALED FRANGIBLE CELLULAR MATERIAL IN WHICH THE CELLS ARE CLOSED IN ORDER TO OPEN COMMUNICATION BETWEEN CELLS, WHICH COMPRISES SUBJECTING THE SURFACES OF THE MATERIAL TO FLUID PRESSURE TO PROGRESSIVELY BREAK PASSAGES THERETHROUGH FROM CELL TO CELL THROUGHOUT THE MATERIAL WITHOUT OTHERWISE BREAKING DOWN THE STRUCTURE.
Claim 2
Independent Claim
51 words
A METHOD OF TREATING AN ANNEALED FRANGIBLE CELLULAR MATERIAL IN WHICH THE CELLS ARE CLOSED IN ORDER TO OPEN COMMUNICATION BETWEEN CELLS, WHICH COMPRISES SUBJECTING THE SURFACES OF THE MATERIAL TO FLUID PRESSURE TO PROGRESSIVELY BREAK PASSAGES THERETHROUGH FROM CELL TO CELL THROUGHOUT THE MATERIAL WITHOUT OTHERWISE BREAKING DOWN THE STRUCTURE.
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |