US1994927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing diphenyl derivatives
Assignee: Rubber Service Laboratories Co
•
Filing: 1932-10-22
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Granted: 1935-03-19
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Expires: 1952-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sibley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:07
CPC Classifications
C; C11; C11D; C11D10/00; C11D10/04; C11D10/042; C09; C09B; C09B67/00; C09B67/0071; C09B67/0077; C09B67/0084; C09B67/0085; C09B67/0086; C11D1/00; C11D1/02; C11D1/12; C11D1/22; C11D1/88; C11D1/30; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
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) | 1938-03-18 | 1938-09-17 | 1939-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-18 | 1942-09-17 | 1943-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-18 | 1946-09-17 | 1947-03-19 | $7700.00 | Window Closed / Lapsed |