US2180945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating construction
Assignee: Burgess Battery Co
•
Filing: 1936-08-01
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Granted: 1939-11-21
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Expires: 1956-08-01
Abstract
No abstract record available.
Inventors
- 👤 Roger G Morey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/02; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/10
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) | 1942-11-20 | 1943-05-22 | 1943-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-20 | 1947-05-22 | 1947-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-20 | 1951-05-22 | 1951-11-21 | $7700.00 | Window Closed / Lapsed |