US2590812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxanes having hydrogen atoms directly attached to silicon atoms
Assignee: Dow Chemical Co
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Filing: 1946-03-30
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Granted: 1952-03-25
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Expires: 1966-03-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:03
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
AN ORGANO-SILICON OXIDE CONDENSATION PRODUCT HAVING HYDROGEN ATOMS ATTACHED DIRECTLY TO SILICON ATOMS OF THE MOLECULE, WHICH PRODUCT IS OF THE GROUP CONSISTING OF (A) CYCLIC POLYSILOXANES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
31 words
AN ORGANO-SILICON OXIDE CONDENSATION PRODUCT HAVING HYDROGEN ATOMS ATTACHED DIRECTLY TO SILICON ATOMS OF THE MOLECULE, WHICH PRODUCT IS OF THE GROUP CONSISTING OF (A) CYCLIC POLYSILOXANES HAVING THE GENERAL FORMULA:
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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |