Patent US2458692A successfully refreshed from Google Patents.
US2616221A
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Glass melting furnace
Assignee: PUERTO RICO GLASS Corp
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Filing: 1950-04-26
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Granted: 1952-11-04
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Expires: 1970-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jewell R Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:03
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/04; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2016945A
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |