Patent US2109015A successfully refreshed from Google Patents.
US2109015A
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US
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Polycyclic phenolic condensation products
Assignee: Individual
•
Filing: 1935-07-05
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Granted: 1938-02-22
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Expires: 1955-07-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Niederl
- 👤 Niederl Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:51
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/17; C07C37/00; C07C37/11; C07C37/16; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-02-21 | 1941-08-23 | 1942-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-02-21 | 1945-08-23 | 1946-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-02-21 | 1949-08-23 | 1950-02-22 | $7700.00 | Window Closed / Lapsed |