Patent US2028636A successfully refreshed from Google Patents.
US2028636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Range
Assignee: Cribben & Sexton Co
•
Filing: 1932-04-16
•
Granted: 1936-01-21
•
Expires: 1952-04-16
Abstract
No abstract record available.
Inventors
- 👤 George D Wilkinson
- 👤 Elmer D Pellegrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:29
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/08; F24C3/085; F24C3/087; F24C15/00; F24C15/16
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) | 1939-01-20 | 1939-07-22 | 1940-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-20 | 1943-07-22 | 1944-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-20 | 1947-07-22 | 1948-01-21 | $7700.00 | Window Closed / Lapsed |