US2707187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: Pharmacia and Upjohn Co
•
Filing: 1952-07-14
•
Granted: 1955-04-26
•
Expires: 1972-07-14
Abstract
No abstract record available.
Inventors
- 👤 John H Koehneke
- 👤 Merrill E Speeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:19
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/08; C07D209/30; C07D209/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2248155A
Cited
US2516332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |