Patent US3267777A successfully refreshed from Google Patents.
Patent US2828681A successfully refreshed from Google Patents.
US2828681A
Expired / Lapsed
US
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Air conditioning apparatus
Assignee: MANSFIELD SANITARY POTTERY Inc
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Filing: 1953-10-28
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Granted: 1958-04-01
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Expires: 1973-10-28
Abstract
No abstract record available.
Inventors
- 👤 Harry F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0046; F24F5/005; F24F8/00; F24F8/10; Y; Y02; Y02B; Y02B10/00; Y02B10/40; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2074283A
Cited
US2135742A
Cited
GB479738A
Cited
US2242378A
Cited
US2301073A
Cited
US2680354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |