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Patent US2563847A successfully refreshed from Google Patents.
US2563847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure
Assignee: Individual
•
Filing: 1947-03-21
•
Granted: 1951-08-14
•
Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Howard R Keys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:04
CPC Classifications
B; B05; B05B; B05B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US173972A
Cited
US409339A
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US692761A
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GB191404729A
Cited
US1189173A
Cited
US1371669A
Cited
US1982879A
Cited
US1928396A
Cited
US2124455A
Cited
US2161060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |