US3331857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolphthalein monophosphate derivatives
Assignee: Warner Lambert Co LLC
•
Filing: 1964-10-01
•
Granted: 1967-07-18
•
Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Charles M Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/34; C12Q1/42; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/65515; C07F9/65517; C09; C09B; C09B11/00; C09B11/04; C09B11/06; C09B11/08; C12Q2334/00; C12Q2334/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2117291A
Cited
US2521982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |