Patent US1934174A successfully refreshed from Google Patents.
US1934174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulation for air spaces
Assignee: INT ALFOL MIJ NV
•
Filing: 1933-03-06
•
Granted: 1933-11-07
•
Expires: 1953-03-06
Abstract
No abstract record available.
Inventors
- 👤 Dyckerhoff Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/12; F16L59/08; Y; Y10; Y10S; Y10S165/00; Y10S165/904; Y10S220/00; Y10S220/918; Y10S62/00; Y10S62/13; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12493; Y10T428/12736; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-11-06 | 1937-05-08 | 1937-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-06 | 1941-05-08 | 1941-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-06 | 1945-05-08 | 1945-11-07 | $7700.00 | Window Closed / Lapsed |