US3287310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random siloxane copolymers containing phenylene and phenyl ether chain linkages
Assignee: Union Carbide Corp
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Filing: 1961-09-29
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Granted: 1966-11-22
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Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 George M Omietanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:20
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A RANDOM COPOLYMERIC ORGANOPOLYSILOXANE GUM HAVING AN INTRINSIC VISCOSITY NUMBER IN BENZENE AT 25*C. OF AT LEAST 0.5 DECILITER PER GRAM AND A MOLECULAR WEIGHT OF FROM ABOUT 100,000 TO ABOUT 3,000,000 COMPRISED OF (A) FROM 5 TO 95 MOLE PERCENT UNITS OF THE FORMULA:
Claim 2
Dependent Claim
45 words
A RANDOM COPOLYMERIC ORGANOPOLYSILOXANE GUM HAVING AN INTRINSIC VISCOSITY NUMBER IN BENZENE AT 25*C. OF AT LEAST 0.5 DECILITER PER GRAM AND A MOLECULAR WEIGHT OF FROM ABOUT 100,000 TO ABOUT 3,000,000 COMPRISED OF (A) FROM 5 TO 95 MOLE PERCENT UNITS OF THE 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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |