Patent US3328346A successfully refreshed from Google Patents.
US3328346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylphenyl polysiloxanes
Assignee: General Electric Co
•
Filing: 1961-12-18
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Granted: 1967-06-27
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Christian R Sporck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:38
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
3 words
THE COMPOUND METHYLHEPTAPHENYLCYCLOTETRASILOXANE.
Claim 2
Dependent Claim
3 words
THE COMPOUND METHYLHEPTAPHENYLCYCLOTETRASILOXANE.
Claim 3
Dependent Claim
21 words
A LINEAR ORGANOPOLYSILOXANE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 10,000 AND CONSISTING ESSENTIALLY OF RECURRING UNITS HAVING THE FORMULA:
Claim 4
Dependent Claim
21 words
A LINEAR ORGANOPOLYSILOXANE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 10,000 AND CONSISTING ESSENTIALLY OF RECURRING UNITS HAVING THE FORMULA:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |