US1177288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic air-ejecting apparatus for heating systems.
Assignee: Individual
•
Filing: 1915-03-08
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Granted: 1916-03-28
•
Expires: 1935-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edward R Teller Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:00
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081
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) | 1919-03-28 | 1919-09-27 | 1920-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-03-28 | 1923-09-27 | 1924-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-03-28 | 1927-09-27 | 1928-03-28 | $7700.00 | Window Closed / Lapsed |