US2831830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur-containing resinous products from polyepoxides
Assignee: Shell Development Co
•
Filing: 1954-05-24
•
Granted: 1958-04-22
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Carl W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A SULFUR-CONTAINING RESINOUS PRODUCT OBTAINED BY HEATING AND REACTING 100 PARTS OF A POLYEPOXIDE HAVING AT LEAST TWO
Claim 2
Dependent Claim
18 words
A SULFUR-CONTAINING RESINOUS PRODUCT OBTAINED BY HEATING AND REACTING 100 PARTS OF A POLYEPOXIDE HAVING AT LEAST TWO
References Cited (Backward Citations)
US2129709A
Cited
US2615008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |