US3322747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thionocarbonate nucleosides
Assignee: Merck and Co Inc
•
Filing: 1965-04-01
•
Granted: 1967-05-30
•
Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Shen Tsung-Ying
- 👤 William V Ruyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 4
Dependent Claim
4 words
COMPOUNDS OF THE FORMULA:
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |