Patent US2235446A successfully refreshed from Google Patents.
US2235446A
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Assignee: Individual
•
Filing: 1939-07-10
•
Granted: 1941-03-18
•
Expires: 1959-07-10
Abstract
No abstract record available.
Inventors
- 👤 Milton H Birger
- 👤 Calvin D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:55
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/18; B28D1/181; B24; B24B; B24B41/00; B24B41/04; B24B41/047; B24D; B24D13/00; B24D13/20; B24D15/00; B24D15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4528
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-03-17 | 1944-09-16 | 1945-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-17 | 1948-09-16 | 1949-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-17 | 1952-09-16 | 1953-03-18 | $7700.00 | Window Closed / Lapsed |