Patent US1990434A successfully refreshed from Google Patents.
US1990434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating material
Assignee: Individual
•
Filing: 1929-12-07
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Granted: 1935-02-05
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Expires: 1949-12-07
Abstract
No abstract record available.
Inventors
- 👤 Kohler Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:51
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C49/00; B29C49/28; B29C49/30; B29C49/38; B29C49/40; B29C48/03; B29C48/09; B29C48/13; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24174; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
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) | 1938-02-04 | 1938-08-06 | 1939-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-04 | 1942-08-06 | 1943-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-04 | 1946-08-06 | 1947-02-05 | $7700.00 | Window Closed / Lapsed |