US1515556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of artificial silk and the like
Assignee: Individual
•
Filing: 1922-01-10
•
Granted: 1924-11-11
•
Expires: 1942-01-10
Abstract
No abstract record available.
Inventors
- 👤 Dreaper William Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:26
CPC Classifications
F; F26; F26B; F26B15/00; F26B15/10; F26B15/12; F26B15/122; F26B15/124
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) | 1927-11-11 | 1928-05-12 | 1928-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-11-11 | 1932-05-12 | 1932-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-11-11 | 1936-05-12 | 1936-11-11 | $7700.00 | Window Closed / Lapsed |