US3159603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic condensation of polymers of alpha-alkenyl ketones
Assignee: International Business Machines Corp
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Filing: 1960-03-17
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Granted: 1964-12-01
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Sporer
- 👤 Charles E Allman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/733; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR THE PREPARATION OF CONJUGATE ETHYLENICALLY UNSATURATED HOMOPOLYMERS CONSISTING ESSENTIALLY OF CONTACTING A POLY(A-LOWER ALKENYL) KETONE OF AN A-LOWER ALKENYL KETONE HAVING THE FORMULA
Claim 2
Dependent Claim
26 words
A PROCESS FOR THE PREPARATION OF CONJUGATE ETHYLENICALLY UNSATURATED HOMOPOLYMERS CONSISTING ESSENTIALLY OF CONTACTING A POLY(A-LOWER ALKENYL) KETONE OF AN A-LOWER ALKENYL KETONE HAVING 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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |