Patent US3828321A successfully refreshed from Google Patents.
US2247028A
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Telephone booth cooling apparatus
Assignee: AT&T Inc
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Filing: 1940-10-29
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Granted: 1941-06-24
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Expires: 1960-10-29
Abstract
No abstract record available.
Inventors
- 👤 Frank A Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:51
CPC Classifications
E; E04; E04H; E04H1/00; E04H1/12; E04H1/14; F; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F25; F25D; F25D19/00; F25D2317/00; F25D2317/06; F25D2317/066; F25D2317/0665; Y; Y10; Y10S; Y10S62/00; Y10S62/16
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) | 1944-06-23 | 1944-12-23 | 1945-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-23 | 1948-12-23 | 1949-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-23 | 1952-12-23 | 1953-06-24 | $7700.00 | Window Closed / Lapsed |