Patent US390122A successfully refreshed from Google Patents.
Patent US1661660A successfully refreshed from Google Patents.
US1661660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold-air connection
Assignee: Individual
•
Filing: 1926-06-14
•
Granted: 1928-03-06
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Expires: 1946-06-14
Abstract
No abstract record available.
Inventors
- 👤 Elmer E Gullion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:35
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/12
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) | 1931-03-06 | 1931-09-05 | 1932-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-06 | 1935-09-05 | 1936-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-06 | 1939-09-05 | 1940-03-06 | $7700.00 | Window Closed / Lapsed |