US2093202A
Expired / Lapsed
US
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Device for operating on elements of heat exchange units
Assignee: EMMA C MAYNES
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Filing: 1936-10-10
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Granted: 1937-09-14
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Expires: 1956-10-10
Abstract
No abstract record available.
Inventors
- 👤 Hyla F Maynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/51; Y10T29/5116; Y10T29/5176; Y10T29/5177; Y10T29/5188; Y10T29/5199; Y10T29/53; Y10T29/53113; Y10T29/53122; Y10T29/53696; Y10T83/00; Y10T83/222; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9428; Y10T83/9435
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) | 1940-09-13 | 1941-03-15 | 1941-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-13 | 1945-03-15 | 1945-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-13 | 1949-03-15 | 1949-09-14 | $7700.00 | Window Closed / Lapsed |