US2844731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film treatment
Assignee: Celanese Corp
•
Filing: 1955-04-22
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Granted: 1958-07-22
•
Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 Plonsky Seymour
- 👤 Chow Ho
- 👤 Schneider Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:58
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |