US2510902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers and method of preparation
Assignee: Hercules Powder Co
•
Filing: 1946-05-18
•
Granted: 1950-06-06
•
Expires: 1966-05-18
Abstract
No abstract record available.
Inventors
- 👤 Stearns T Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
C; C08; C08F; C08F22/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A COPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID ANHYDRIDE, CHLOROMALEIC ANHYDRIDE AND DIMETHYL MALEATE AND A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
25 words
A COPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID ANHYDRIDE, CHLOROMALEIC ANHYDRIDE AND DIMETHYL MALEATE AND A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US1188882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |