Patent US2904481A successfully refreshed from Google Patents.
US2904481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state polymerization
Assignee: General Electric Co
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Filing: 1955-06-29
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Granted: 1959-09-15
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Expires: 1975-06-29
Abstract
No abstract record available.
Inventors
- 👤 Elliott J Lawton
- 👤 Jr Willard T Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:55
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS OF PREPARING CROSS-LINKED POLYDIMETHYLSILOXANES WHICH COMPRISES IRRADIATING SOLID HEXAMETHYLCYCLOTRISILOXANE WITH IONIZING RADIATION HAVING ENERGY EQUIVALENT TO AT LEAST 5X104 ELECTRON VOLTS.
Claim 2
Dependent Claim
23 words
A PROCESS OF PREPARING CROSS-LINKED POLYDIMETHYLSILOXANES WHICH COMPRISES IRRADIATING SOLID HEXAMETHYLCYCLOTRISILOXANE WITH IONIZING RADIATION HAVING ENERGY EQUIVALENT TO AT LEAST 5X104 ELECTRON VOLTS.
References Cited (Backward Citations)
US2766220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |