US2508470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing board attachment
Assignee: Individual
•
Filing: 1946-07-02
•
Granted: 1950-05-23
•
Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Curt R Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
CPC Classifications
B; B43; B43L; B43L5/00; B43L5/02; Y; Y10; Y10T; Y10T24/00; Y10T24/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US126901A
Cited
US290381A
Cited
US363396A
Cited
US387364A
Cited
US448822A
Cited
US1759989A
Cited
US1871719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |