US2150653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Normal lead styphnate and a method of making it
Assignee: Western Cartridge Co
•
Filing: 1937-09-22
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Granted: 1939-03-14
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Expires: 1957-09-22
Abstract
No abstract record available.
Inventors
- 👤 Burvee M Franz
- 👤 John W Wilkinson
- 👤 Samuel D Ehrlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:18
CPC Classifications
C; C06; C06B; C06B41/00; C06B41/02; C06B41/08; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111
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) | 1942-03-13 | 1942-09-12 | 1943-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-13 | 1946-09-12 | 1947-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-13 | 1950-09-12 | 1951-03-14 | $7700.00 | Window Closed / Lapsed |