Patent US2804316A successfully refreshed from Google Patents.
Patent US4687797A successfully refreshed from Google Patents.
Patent US5318312A successfully refreshed from Google Patents.
Patent US5616931A successfully refreshed from Google Patents.
Patent US2830972A successfully refreshed from Google Patents.
US2830972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic polymers and their preparation
Assignee: EIDP Inc
•
Filing: 1954-03-09
•
Granted: 1958-04-15
•
Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Shacklett Comer Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:40
CPC Classifications
B; B60; B60C; B60C19/00; B29; B29D; B29D30/00; B29D30/06; B29D30/38; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; B60C11/00; B60C11/0008; B60C2011/0016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COPOLYMER CONSISTING OF RECURRING INTRALINEAR UNITS OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A COPOLYMER CONSISTING OF RECURRING INTRALINEAR UNITS OF THE FORMULA:
References Cited (Backward Citations)
CA495934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |