Patent US2837809A successfully refreshed from Google Patents.
US2837809A
Expired / Lapsed
US
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Process of producing fabric containing kinky woolen pile
Assignee: Specialties Development Corp
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Filing: 1955-07-05
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Granted: 1958-06-10
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand H Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/01; D06M11/05; D03; D03D; D03D27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |