US2554976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of polymethylsilylenes and method of preparing the same
Assignee: General Electric Co
•
Filing: 1948-09-01
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Granted: 1951-05-29
•
Expires: 1968-09-01
Abstract
No abstract record available.
Inventors
- 👤 Charles A Burkhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:16
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A COMPOSITION OF MATTER SELECTED FROM THE CLASS CONSISTING OF (1) A POLYMER CONSISTING OF A PLURALITY OF AT LEAST SIX SILICON ATOMS LINKED DIRECTLY TO EACH OTHER, EACH SILICON ATOM CONTAINING TWO METHYL GROUPS ATTACHED THERETO BY CAR BON-SILICON LINKAGES AND (2) A POLYMER HAVING THE FORMULA (CH3)2SI)(CH3)2SIO)11CL2
Claim 2
Dependent Claim
49 words
A COMPOSITION OF MATTER SELECTED FROM THE CLASS CONSISTING OF (1) A POLYMER CONSISTING OF A PLURALITY OF AT LEAST SIX SILICON ATOMS LINKED DIRECTLY TO EACH OTHER, EACH SILICON ATOM CONTAINING TWO METHYL GROUPS ATTACHED THERETO BY CAR BON-SILICON LINKAGES AND (2) A POLYMER HAVING THE FORMULA (CH3)2SI)(CH3)2SIO)11CL2
References Cited (Backward Citations)
US2380996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |