US2837873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making dense-face, cellular vitreous bodies
Assignee: Pittsburgh Corning LLC
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Filing: 1955-03-31
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Granted: 1958-06-10
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Walter F Lynsavage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007; C03B; C03B19/00; C03B19/06; C03B19/08; Y; Y10; Y10S; Y10S264/00; Y10S264/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF MAKING A CELLULAR BODY HAVING A UNITARY CELLULAR, RELATIVELY DENSE FACING LAYER AND A CELLULAR RELATIVELY LIGHTWORK BACKING, WHICH COMPRISES MIXING PULVERIZED VITEROUS MATERIAL AND AN AMOUNT OF A FIRST CELLULATING AGENT TO PROVIDE A FIRST BATCH ADAPTED WHEN HEATED TO CELLULATING TEMPERATURE TO FORM SAID RELATIVELY DENSE FACING LAYER, MIXING PULVERIZED VITEOUS MATERIAL AND AN AMOUNT OF A SECOND CELLULATING AGENT TO PROVIDE A SECOND BATCH ADAPTED WHEN HEATED TO CELLULATING TEMPERATURE TO FORM SAID RELATIVELY LIGHTWEIGHT BACKING, EACH OF SAID CELLULATING AGENTS HAVING A TEMPERATURE OF REACTION
Claim 2
Independent Claim
92 words
A METHOD OF MAKING A CELLULAR BODY HAVING A UNITARY CELLULAR, RELATIVELY DENSE FACING LAYER AND A CELLULAR RELATIVELY LIGHTWORK BACKING, WHICH COMPRISES MIXING PULVERIZED VITEROUS MATERIAL AND AN AMOUNT OF A FIRST CELLULATING AGENT TO PROVIDE A FIRST BATCH ADAPTED WHEN HEATED TO CELLULATING TEMPERATURE TO FORM SAID RELATIVELY DENSE FACING LAYER, MIXING PULVERIZED VITEOUS MATERIAL AND AN AMOUNT OF A SECOND CELLULATING AGENT TO PROVIDE A SECOND BATCH ADAPTED WHEN HEATED TO CELLULATING TEMPERATURE TO FORM SAID RELATIVELY LIGHTWEIGHT BACKING, EACH OF SAID CELLULATING AGENTS HAVING A TEMPERATURE OF REACTION
References Cited (Backward Citations)
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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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |