US2949646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming fibrous structures
Assignee: Changewood Corp
•
Filing: 1953-11-24
•
Granted: 1960-08-23
•
Expires: 1973-11-24
Abstract
No abstract record available.
Inventors
- 👤 James D A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/10; B27N3/14; B27N3/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424791A
Cited
US2218338A
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US2257112A
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US2236472A
Cited
US2689975A
Cited
US2693619A
Cited
US2746096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |