Patent US2735837A successfully refreshed from Google Patents.
US2735837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of z
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F18/00; C08F18/02; C08F18/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN INTERPOLYMER OF 2,5-DIACETOXYSTYRENE, VINYL HYDROQUINONE MONOACETATE, AT LEAST 10 MOLE PERCENT OF VINYL HYDROQUINONE AND AT LEAST 10 MOLE PERCENT OF ACRYLIC ACID.
Claim 2
Dependent Claim
24 words
AN INTERPOLYMER OF 2,5-DIACETOXYSTYRENE, VINYL HYDROQUINONE MONOACETATE, AT LEAST 10 MOLE PERCENT OF VINYL HYDROQUINONE AND AT LEAST 10 MOLE PERCENT OF ACRYLIC ACID.
References Cited (Backward Citations)
US2047398A
Cited
US2276138A
Cited
US2552329A
Cited
US2471959A
Cited
DE807440C
Cited
US2668802A
Cited
DE813080C
Cited
US2700029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |