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Patent US2203477A successfully refreshed from Google Patents.
US2203477A
Expired / Lapsed
US
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Ventilating system for automobiles
Assignee: American Motors Corp
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Filing: 1938-02-10
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Granted: 1940-06-04
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Expires: 1958-02-10
Abstract
No abstract record available.
Inventors
- 👤 Wahlberg Nils Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:16
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/26; B60H1/28; B60H1/00007; B60H1/00021; B60H1/00035; B60H1/00042; B60H1/247; B60H1/248; B60H1/249; B60H3/00; B60H3/06; B60H3/0608; B60H3/0641; B60H2001/00078; B60H2001/00085; B60H2003/065; Y; Y10; Y10S; Y10S55/00; Y10S55/29; Y10S55/37
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) | 1943-06-04 | 1943-12-04 | 1944-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-04 | 1947-12-04 | 1948-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-04 | 1951-12-04 | 1952-06-04 | $7700.00 | Window Closed / Lapsed |