Patent US2303869A successfully refreshed from Google Patents.
US2303869A
Expired / Lapsed
US
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Treatment of metals
Assignee: General Electric Co
•
Filing: 1939-11-28
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Granted: 1942-12-01
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Expires: 1959-11-28
Abstract
No abstract record available.
Inventors
- 👤 Frank B Quinlan
- 👤 Lloyd P Grobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/08; C23C28/00; C23C28/02; C23C28/023; C23C4/02; C23C4/18; Y; Y10; Y10S; Y10S29/00; Y10S29/039; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/937; Y10S428/939; Y10S428/941; Y10S8/00; Y10S8/13; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972
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) | 1945-11-30 | 1946-06-01 | 1946-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-30 | 1950-06-01 | 1950-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-30 | 1954-06-01 | 1954-12-01 | $7700.00 | Window Closed / Lapsed |