Patent US3268350A successfully refreshed from Google Patents.
US3268350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable silicate composition
Assignee: Dow Chemical Co
•
Filing: 1962-06-13
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Granted: 1966-08-23
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Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 John J Grebe
- 👤 John F Miller
- 👤 Wayne L Rhinchart
- 👤 Thomas R Wayt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:04
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A FOAMABLE SILICATE COMPOSITION WHICH COMPRISES: SODIUM OXIDE AND SILICON DIOXIDE HAVING A NA2O/SIO2 MOLAR PROPORTION OF ABOUT 1/1.3 AND CONTAINS ON THE TOTAL COMPOSITION WEIGHT ABOUT 21.5 WEIGHT PERCENT AL2O3, ABOUT 2.5 WEIGHT PERCENT MNO2, ABOUT0.8 WEIGHT PERCENT CAO, ABOUT 0.7 WEIGHT PERCENT MGO, ABOUT 0.9 WEIGHT PERCENT TIO2, AND ABOUT 0.2 WEIGHT PERCENT FE2O3.
Claim 2
Dependent Claim
56 words
A FOAMABLE SILICATE COMPOSITION WHICH COMPRISES: SODIUM OXIDE AND SILICON DIOXIDE HAVING A NA2O/SIO2 MOLAR PROPORTION OF ABOUT 1/1.3 AND CONTAINS ON THE TOTAL COMPOSITION WEIGHT ABOUT 21.5 WEIGHT PERCENT AL2O3, ABOUT 2.5 WEIGHT PERCENT MNO2, ABOUT0.8 WEIGHT PERCENT CAO, ABOUT 0.7 WEIGHT PERCENT MGO, ABOUT 0.9 WEIGHT PERCENT TIO2, AND ABOUT 0.2 WEIGHT PERCENT FE2O3.
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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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |