Patent US2399521A successfully refreshed from Google Patents.
US3238191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonic acid analogs of nucleoside phosphates and method
Assignee: Individual
•
Filing: 1962-09-13
•
Granted: 1966-03-01
•
Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Terrell C Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H1/00; C07H1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
THE METHOD OF PRODUCING A PHOSPHOMIC ACID ANALOG OF A NUCLEOSIDE PHOSPHATE COMPRISING THE STEPS OF REACTING A NUCLEOSIDE MONOPHOSPHATE WITH A LOWER ALKYLELE DIPHOSPHONIC ACID IN THE PRESENCE OF A CONDENSING AGENT IN ACCORDANCE WITH THE FOLLOWING EQUATION
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |