US3274155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon compositions
Assignee: Midland Silicones Ltd
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Filing: 1964-08-05
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Granted: 1966-09-20
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Saunders
- 👤 Derek S Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/48; C08G77/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF THE PRODUCT FORMED BY REDUCING (A) PYROMELLITIC DIANHYDRIDE WITH (B) AN AMINO-ORGANOSILOXANE HAVING AT LEAST TWO UNITS SELECTED FROM THE GROUP CONSISTING OF R2SIO, RSIO1.5 AND R3SIO0.5 WHEREIN EACH R IS A MONOVALENT ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, HALOGENATED HYDROCARBON RADICALS, CYANOALKYL RADICALS, ALKOXY RADICALS AND AMINO ORGANIC RADICALS OF THE FORMULA -Z-NH2 WHEREIN Z IS A DIVALENT ORGANIC RADICAL CONTAINING ATOMS SELECTED FROM THE GROUP CONSISTING OF CARBON ATOMS, HYDROGEN ATOMS, OXYGEN ATOMS, NITROGEN ATOMS, HALOGEN ATOMS AND SULFUR ATOMS AND BONDING THE AMINO GROUP TO A SILICON ATOM THROUGH A SILICON-CARBON BOND, SAID SILOXANE HAVING AT LEAST TWO MONOVALENT ORGANIC RADICALS PER MOLECULE WHICH ARE AMINO ORGANIC RADICALS.
Claim 2
Dependent Claim
122 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF THE PRODUCT FORMED BY REDUCING (A) PYROMELLITIC DIANHYDRIDE WITH (B) AN AMINO-ORGANOSILOXANE HAVING AT LEAST TWO UNITS SELECTED FROM THE GROUP CONSISTING OF R2SIO, RSIO1.5 AND R3SIO0.5 WHEREIN EACH R IS A MONOVALENT ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, HALOGENATED HYDROCARBON RADICALS, CYANOALKYL RADICALS, ALKOXY RADICALS AND AMINO ORGANIC RADICALS OF THE FORMULA -Z-NH2 WHEREIN Z IS A DIVALENT ORGANIC RADICAL CONTAINING ATOMS SELECTED FROM THE GROUP CONSISTING OF CARBON ATOMS, HYDROGEN ATOMS, OXYGEN ATOMS, NITROGEN ATOMS, HALOGEN ATOMS AND SULFUR ATOMS AND BONDING THE AMINO GROUP TO A SILICON ATOM THROUGH A SILICON-CARBON BOND, SAID SILOXANE HAVING AT LEAST TWO MONOVALENT ORGANIC RADICALS PER MOLECULE WHICH ARE AMINO ORGANIC RADICALS.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |