Patent US2503308A successfully refreshed from Google Patents.
US2503308A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1945-06-25
•
Granted: 1950-04-11
•
Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 Wiener Morton
- 👤 Melville H Locker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:26
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US221635A
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US299454A
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US507410A
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US633912A
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US1593123A
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US1632645A
Cited
US2192940A
Cited
US2336509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |