Patent US3263737A successfully refreshed from Google Patents.
US3263737A
Expired / Lapsed
US
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Method of automatically maintaining the condition of the atmosphere within a room
Assignee: Individual
•
Filing: 1963-11-29
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Granted: 1966-08-02
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Brummendorf Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:11
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F6/00; F24F6/12; F24F6/14; F24F2006/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678101A
Cited
US2244634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |