US2754547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulation composition and preparation thereof
Assignee: Columbia Southern Chemical Corp
•
Filing: 1951-11-17
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Granted: 1956-07-17
•
Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Edward M Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A METHOD OF PREPARING FORMED HEAT INSULATION, WHICH COMPRISES: MIXING AN AQUEOUS SUSPENSION CONSISTING ESSENTIALLY OF DISCRETE PARTICLES OF CHEMICALLY PRECIPITATED ALKALINE EARTH METAL SILICATE OF THE COMPOSITION
Claim 2
Independent Claim
28 words
A METHOD OF PREPARING FORMED HEAT INSULATION, WHICH COMPRISES: MIXING AN AQUEOUS SUSPENSION CONSISTING ESSENTIALLY OF DISCRETE PARTICLES OF CHEMICALLY PRECIPITATED ALKALINE EARTH METAL SILICATE OF THE COMPOSITION
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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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |