US2633458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur-containing resinous products from polyepoxides
Assignee: Shell Development Co
•
Filing: 1951-11-17
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Granted: 1953-03-31
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Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:12
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/14; C08G59/1405; C08G59/1411; C08G59/1416; C08G59/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A SULFUR-CONTAINING RESINOUS PRODUCT OBTAINED BY REACTING A POLYEPOXIDE WITH HYDROGEN SULFIDE.
Claim 2
Dependent Claim
12 words
A SULFUR-CONTAINING RESINOUS PRODUCT OBTAINED BY REACTING A POLYEPOXIDE WITH HYDROGEN SULFIDE.
References Cited (Backward Citations)
CH251647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |