Patent US2474912A successfully refreshed from Google Patents.
US2474912A
Expired / Lapsed
US
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Drawtwister
Assignee: EIDP Inc
•
Filing: 1946-03-16
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Granted: 1949-07-05
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Expires: 1966-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank S Pollock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:14
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US936346A
Cited
US2045079A
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US2172497A
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US2185245A
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US2212691A
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US2226135A
Cited
US2289232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |