US2938004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adducts of aromatic polyamines and monoepoxides
Assignee: Shell USA Inc
•
Filing: 1955-04-28
•
Granted: 1960-05-24
•
Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Hoff Ronald L De
- 👤 Harvey L Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:31
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A DIOXANE SOLUBLE COMPLEX ADDUCT USEFUL AS A CURING AGENT FOR POLYEPOXIDES COMPRISING THE REACTION PRODUCT OF A MONOEPOXIDE HAVING A TERMINAL
Claim 2
Dependent Claim
22 words
A DIOXANE SOLUBLE COMPLEX ADDUCT USEFUL AS A CURING AGENT FOR POLYEPOXIDES COMPRISING THE REACTION PRODUCT OF A MONOEPOXIDE HAVING A TERMINAL
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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |