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US2482533A
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Assignee: B F Drakenfeld & Co Inc
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Filing: 1947-04-10
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Granted: 1949-09-20
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 Andrews Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:00
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/04; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2063252A
Cited
US2247196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |