Patent US3242032A successfully refreshed from Google Patents.
US3242032A
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Glass spheres and underground proppants and methods of making the same
Assignee: Individual
•
Filing: 1961-11-24
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Granted: 1966-03-22
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:51
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/02; C03B19/00; C03B19/10; C03B19/1005; C03B19/1095; C03C; C03C17/00; C03C17/06; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/251; C03C2218/00; C03C2218/10; C03C2218/17; Y; Y10; Y10S; Y10S507/00; Y10S507/906; Y10S507/922; Y10S507/924; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
45 words
A METHOD OF MAKING HIGH STRENGTH BODIES OF GLASS HAVING A GENERALLY SPHERICAL SHAPE, COMPRISING THE STEPS OF HEATING SAID GLASS BODY TO A TEMPERATURE ABOVE ITS SOFTENING POINT AND INTRODUCING SAID HEATED BODY AT A TEMPERATURE ABOVE ITS SOFTENING POINT INTO A QUENCHING FLUID.
Claim 2
Independent Claim
45 words
A METHOD OF MAKING HIGH STRENGTH BODIES OF GLASS HAVING A GENERALLY SPHERICAL SHAPE, COMPRISING THE STEPS OF HEATING SAID GLASS BODY TO A TEMPERATURE ABOVE ITS SOFTENING POINT AND INTRODUCING SAID HEATED BODY AT A TEMPERATURE ABOVE ITS SOFTENING POINT INTO A QUENCHING FLUID.
Claim 3
Dependent Claim
32 words
AN ARTICLE MADE ACCORDING TO THE METHOD OF CLAIM 1 WHICH IS CHARACTERIZED BY A COMPRESSIVE STRENGTH IN EXCESS OF 50,000LBS./IN.2 AND BY RESISTANCE TO CHEMICAL ATTACK AT TEMPERATURES OF ABOUT 250*F.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |