Patent US2497377A successfully refreshed from Google Patents.
US2497377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile
Assignee: Individual
•
Filing: 1948-10-05
•
Granted: 1950-02-14
•
Expires: 1968-10-05
Abstract
No abstract record available.
Inventors
- 👤 Swann Philip
- 👤 Sung Reginald Henry Lothian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:55
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/24; E02D5/00; E02D5/22; E02D5/24; E02D5/32; E02D5/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE676088C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |