Patent US1373268A successfully refreshed from Google Patents.
Patent US2749378A successfully refreshed from Google Patents.
US2749378A
Expired / Lapsed
US
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Method and apparatus for glass production
Assignee: Individual
•
Filing: 1954-01-08
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Granted: 1956-06-05
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Expires: 1974-01-08
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Penberthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:44
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/027; C03B5/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF MANUFACTURING GLASS IN A FURNACE WHICH COMPRISES HEATING THE GLASS BATH BY HEAT FROM COMBUSTION AND SIMULTANEOUSLY HEATING THE GLASS BATH BY JOULE EFFECT ELECTRIC CURRENTS PASSING THROUGH SAID GLASS BOTH BETWEEN ELECTRODES WITHIN SAID FURNACE AND NEAR THE WALLS THEREOF IN SUCH A MANNER AS TO LIBERATE OVER ONE HALF OF SAID JOULE EFFECT HEAT IN A ZONE NEAR THE SIDE AND BACK WALLS OF SAID FURNACE.
Claim 2
Independent Claim
71 words
A METHOD OF MANUFACTURING GLASS IN A FURNACE WHICH COMPRISES HEATING THE GLASS BATH BY HEAT FROM COMBUSTION AND SIMULTANEOUSLY HEATING THE GLASS BATH BY JOULE EFFECT ELECTRIC CURRENTS PASSING THROUGH SAID GLASS BOTH BETWEEN ELECTRODES WITHIN SAID FURNACE AND NEAR THE WALLS THEREOF IN SUCH A MANNER AS TO LIBERATE OVER ONE HALF OF SAID JOULE EFFECT HEAT IN A ZONE NEAR THE SIDE AND BACK WALLS OF SAID FURNACE.
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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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |