Patent US2203995A successfully refreshed from Google Patents.
US3116522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell mold compositions
Assignee: Individual
•
Filing: 1960-02-15
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Granted: 1964-01-07
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Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 Howard F Taylor
- 👤 Raymond G Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:32
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A DRY, INVESTMENT TYPE SHELL MOLD CONSISTING ESSENTIALLY OF A HARDENED LAYER COMPOSED ESSENTIALLY OF A MIXTURE OF PARTICULATE REFRACTORY MATERIAL, THERMOSETTING RESIN, AND A GRANULAR CARBONATE SELECTED FROM THE GROUP CONSISTING OF LIMESTONE, DOLOMITE, MAGNESITE, AND MIXTURES THEREOF, THE PARTICLE SIZE OF SAID GRANULAR CARBONATE BEING MAINLY IN THE RANGE BETWEEN ABOUT MINUS 10 MESH AND ABOUT PLUS 270 MESH, THE AMOUNT OF SAID GRANULAR CARBONATE BEING FROM ABOUT 5% TO 15% BY WEIGHT, THE AMOUNT OF SAID RESIN BEING ABOUT 3 TO ABOUT 8% BY WEIGHT AND THE BALANCE ESSENTIALLY BEING SAID PARTICULATE REFRACTORY MATERIAL.
Claim 2
Dependent Claim
97 words
A DRY, INVESTMENT TYPE SHELL MOLD CONSISTING ESSENTIALLY OF A HARDENED LAYER COMPOSED ESSENTIALLY OF A MIXTURE OF PARTICULATE REFRACTORY MATERIAL, THERMOSETTING RESIN, AND A GRANULAR CARBONATE SELECTED FROM THE GROUP CONSISTING OF LIMESTONE, DOLOMITE, MAGNESITE, AND MIXTURES THEREOF, THE PARTICLE SIZE OF SAID GRANULAR CARBONATE BEING MAINLY IN THE RANGE BETWEEN ABOUT MINUS 10 MESH AND ABOUT PLUS 270 MESH, THE AMOUNT OF SAID GRANULAR CARBONATE BEING FROM ABOUT 5% TO 15% BY WEIGHT, THE AMOUNT OF SAID RESIN BEING ABOUT 3 TO ABOUT 8% BY WEIGHT AND THE BALANCE ESSENTIALLY BEING SAID PARTICULATE REFRACTORY MATERIAL.
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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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |