Patent US5211638A successfully refreshed from Google Patents.
Patent US2132671A successfully refreshed from Google Patents.
US2132671A
Expired / Lapsed
US
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Condensation products
Assignee: Rohm and Haas Co
•
Filing: 1937-12-20
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Granted: 1938-10-11
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Expires: 1957-12-20
Abstract
No abstract record available.
Inventors
- 👤 Bauer Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
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) | 1941-10-10 | 1942-04-11 | 1942-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-10 | 1946-04-11 | 1946-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-10 | 1950-04-11 | 1950-10-11 | $7700.00 | Window Closed / Lapsed |