Patent US2874188A successfully refreshed from Google Patents.
US2874188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R cooet
Assignee: —
•
Filing: —
•
Granted: 1959-02-17
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:26
CPC Classifications
C; C07; C07C; C07C233/00; C07C231/00; C07C231/02; C07C231/12; C07C231/22; C07C231/24; C07C237/00; C07C237/28; C07C237/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF THOSE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF THOSE HAVING THE GENERAL FORMULA:
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |