US2570060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double piepan
Assignee: Individual
•
Filing: 1949-06-21
•
Granted: 1951-10-02
•
Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 Johnson Maude Fulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:33
CPC Classifications
A; A21; A21B; A21B3/00; A21B3/13; Y; Y10; Y10S; Y10S99/00; Y10S99/15
Claims Analysis
Total Claims: 0
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US2297914A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |