US2475846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylidene-bis-acrylamides
Assignee: Wyeth Holdings LLC
•
Filing: 1946-10-31
•
Granted: 1949-07-12
•
Expires: 1966-10-31
Abstract
No abstract record available.
Inventors
- 👤 Lennart A Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:53
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2173005A
Cited
FR827059A
Cited
GB482897A
Cited
US2132671A
Cited
FR837576A
Cited
US2279497A
Cited
US2328901A
Cited
US2338177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |