Patent US2834758A successfully refreshed from Google Patents.
US2834758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of n-acrylamido alkyl betaines
Assignee: EIDP Inc
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Filing: 1954-03-09
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Granted: 1958-05-13
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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
2026-10-23 16:28
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A COPOLYMER CONTAINING RECURRING INTRALINEAR UNITS OF THE FORMULAE:
Claim 2
Dependent Claim
9 words
A COPOLYMER CONTAINING RECURRING INTRALINEAR UNITS OF THE FORMULAE:
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |