US2156156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing grooves or channels in dielectric materials
Assignee: Individual
•
Filing: 1935-07-15
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Granted: 1939-04-25
•
Expires: 1955-07-15
Abstract
No abstract record available.
Inventors
- 👤 Mahlck Gustave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/56; B01L3/561; C; C03; C03B; C03B23/00; C03B23/26; Y; Y10; Y10S; Y10S425/00; Y10S425/012; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49156; Y10T29/4981
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) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |