Patent US3433846A successfully refreshed from Google Patents.
US2983744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocycles
Assignee: EIDP Inc
•
Filing: 1955-11-17
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Granted: 1961-05-09
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Expires: 1975-11-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter H Knoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
A 2,2-DIHYDROCARBO-1-OXA-2-SILACYCLOALKANE CONTAINING ONLY CARBON ATOMS, HYDROGEN ATOMS, ONE OXYGEN ATOM, AND ONE SILICON ATOM AND HAVING FROM FIVE TO SEVEN MEMBERS IN THE RING, ONE BEING OXYGEN AND ONE SILICON.
Claim 2
Dependent Claim
31 words
A 2,2-DIHYDROCARBO-1-OXA-2-SILACYCLOALKANE CONTAINING ONLY CARBON ATOMS, HYDROGEN ATOMS, ONE OXYGEN ATOM, AND ONE SILICON ATOM AND HAVING FROM FIVE TO SEVEN MEMBERS IN THE RING, ONE BEING OXYGEN AND ONE SILICON.
Claim 3
Dependent Claim
17 words
A POLYMER OF A COMPOUND ACCORDING TO CLAIM 1 ESSENTIALLY CONSISTING OF RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |