US2870098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing resins of polysubstituted benzenes
Assignee: Shell Development Co
•
Filing: 1956-01-23
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Granted: 1959-01-20
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Robert W Martin
- 👤 Fred E Condo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:32
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR PREPARING POLYMERS HAVING REOCCURING UNITS OF THE STRUCTURE
Claim 2
Dependent Claim
11 words
A PROCESS FOR PREPARING POLYMERS HAVING REOCCURING UNITS OF THE STRUCTURE
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |