Patent US3244675A successfully refreshed from Google Patents.
US3244675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly (1, 3-oxaza-2, 4-diones) polymers
Assignee: EIDP Inc
•
Filing: 1963-03-04
•
Granted: 1966-04-05
•
Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Rudolph J Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:16
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/34; C08G18/348; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
POLY(1,3-OXAZA-2,-4-DIONE) HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
5 words
POLY(1,3-OXAZA-2,-4-DIONE) HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2929800A
Cited
US2866774A
Cited
US2930780A
Cited
US3063966A
Cited
US3030339A
Cited
US3094511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |