US2750347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol-formaldehyde polymer of nu-p-toluenesulfonyl-l-tyrosine
Assignee: Individual
•
Filing: 1953-12-08
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Granted: 1956-06-12
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Bunnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:24
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |