Patent US2981746A successfully refreshed from Google Patents.
US2981746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoro substituted polysiloxanes and preparation thereof
Assignee: ATK Launch Systems LLC
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Filing: 1958-05-29
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Granted: 1961-04-25
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Murray S Cohen
- 👤 Grafstein Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:56
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A LOW MOLECULAR WEIGHT LIQUID POLYORGANOSILOXANE POLYMER HAVING A RECURRENT STRUCTURAL UNIT OF THE FORMULA
Claim 2
Dependent Claim
15 words
A LOW MOLECULAR WEIGHT LIQUID POLYORGANOSILOXANE POLYMER HAVING A RECURRENT STRUCTURAL UNIT OF THE FORMULA
References Cited (Backward Citations)
CA534818A
Cited
US2381366A
Cited
US2469888A
Cited
US2695307A
Cited
US2485928A
Cited
DE1030346B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |