US3021297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane resins
Assignee: General Electric Co
•
Filing: 1960-01-21
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Granted: 1962-02-13
•
Expires: 1980-01-21
Abstract
No abstract record available.
Inventors
- 👤 George Philip Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:26
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
THE PROCESS FOR MAKING AN AIR DRYING METHYLPOLYSILOXANE WHICH COMPRISES CONTACTING CHLOROMETHYLHEPTAMETHYLCYCLOTETRASILOXANE WITH A CATALYTIC AMOUNT OF ANHYDROUS FERRIC CHLORIDE UNDER ANAEROBIC CONDITIONS.
Claim 2
Dependent Claim
23 words
THE PROCESS FOR MAKING AN AIR DRYING METHYLPOLYSILOXANE WHICH COMPRISES CONTACTING CHLOROMETHYLHEPTAMETHYLCYCLOTETRASILOXANE WITH A CATALYTIC AMOUNT OF ANHYDROUS FERRIC CHLORIDE UNDER ANAEROBIC CONDITIONS.
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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |