US1839168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric for gas protection masks or the like and method for producing same
Assignee: Individual
•
Filing: 1929-03-26
•
Granted: 1931-12-29
•
Expires: 1949-03-26
Abstract
No abstract record available.
Inventors
- 👤 Stampe Gerhard Karl E Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
A; A62; A62D; A62D5/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172; Y10T442/20; Y10T442/2508
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) | 1934-12-28 | 1935-06-29 | 1935-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-28 | 1939-06-29 | 1939-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-28 | 1943-06-29 | 1943-12-29 | $7700.00 | Window Closed / Lapsed |