US1350271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming artificial leather and the product thereof
Assignee: Du Pont Fabrikoid Co
•
Filing: 1915-10-23
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Granted: 1920-08-17
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Expires: 1935-10-23
Abstract
No abstract record available.
Inventors
- 👤 Arnold Charles Elwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:32
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0002; D06N3/0013; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172
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) | 1923-08-17 | 1924-02-16 | 1924-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-08-17 | 1928-02-16 | 1928-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-08-17 | 1932-02-16 | 1932-08-17 | $7700.00 | Window Closed / Lapsed |