US2662834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproofing process
Assignee: Celanese Corp
•
Filing: 1951-08-22
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Granted: 1953-12-15
•
Expires: 1971-08-22
Abstract
No abstract record available.
Inventors
- 👤 Walter D Paist
- 👤 Norman Van Gorder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |