Patent US2730548A successfully refreshed from Google Patents.
US2730548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing polycyclic hydrocarbons and derivatives thereof
Assignee: Shell Development Co
•
Filing: 1951-07-20
•
Granted: 1956-01-10
•
Expires: 1971-07-20
Abstract
No abstract record available.
Inventors
- 👤 Bluestone Henry
- 👤 Samuel B Soloway
- 👤 Hyman Julius
- 👤 Rex E Lidov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:22
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C13/00; C07C13/28; C07C13/32; C07C2601/00; C07C2601/06; C07C2601/10; C07C2602/00; C07C2602/36; C07C2602/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PROCESS FOR PREPARING COMPOUNDS CONTAINING THE NOR-TRICYCLENE NUCLEUS WHICH IN PLANAR STRUCTURAL REPRESENTATION IS
Claim 2
Dependent Claim
15 words
A PROCESS FOR PREPARING COMPOUNDS CONTAINING THE NOR-TRICYCLENE NUCLEUS WHICH IN PLANAR STRUCTURAL REPRESENTATION IS
References Cited (Backward Citations)
US2393610A
Cited
US2395454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |