Patent US2863476A successfully refreshed from Google Patents.
US2863476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing fibrous elements
Assignee: Changewood Corp
•
Filing: 1953-10-02
•
Granted: 1958-12-09
•
Expires: 1973-10-02
Abstract
No abstract record available.
Inventors
- 👤 James D A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US233765A
Cited
US563301A
Cited
US609114A
Cited
US950011A
Cited
US1538066A
Cited
US1772712A
Cited
US1814726A
Cited
US2004367A
Cited
US2178940A
Cited
US2269352A
Cited
US2392844A
Cited
US2442492A
Cited
US2549251A
Cited
US2620138A
Cited
US2751947A
Cited
US2652077A
Cited
US2710635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |