Patent US1973689A successfully refreshed from Google Patents.
US1973689A
Expired / Lapsed
US
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Method of and apparatus for melting glass, etc.
Assignee: AMCO Inc
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Filing: 1932-03-01
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Granted: 1934-09-11
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Expires: 1952-03-01
Abstract
No abstract record available.
Inventors
- 👤 Paul L Geer
- 👤 Harold A Moore
- 👤 William A Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:43
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/04; C03B5/16; C03B5/235; C03B5/237; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-09-10 | 1938-03-12 | 1938-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-10 | 1942-03-12 | 1942-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-10 | 1946-03-12 | 1946-09-11 | $7700.00 | Window Closed / Lapsed |