Patent US3281395A successfully refreshed from Google Patents.
US3281395A
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Method of preparing formaldehyde by vibration
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1963-04-11
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Granted: 1966-10-25
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Fukita Eiji
- 👤 Ishibashi Yasutaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:19
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; B; B01; B01J; B01J19/00; B01J19/28; B01J19/285; C08G2/08; F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF POLYMERIZATION OF FORMALDEHYDE BY VIBRATION CONSISTING OF: FIRST INTRODUCING FORMALDEHYDE IN VAPOR PHASE AND A CATALYST CONSISTING OF NITROGENOUS MACROMOLECULES INTO A LAYER OF REACTING POWDER IN A REACTOR CHAMBER, WITHDRAWING THE POLYMERIZED FORMALDEHYDE POWDER FROM THE REACTOR CHAMBER AND VIBRATING THE REACTOR CHAMBER DURING THE PASSAGE OF THE FORMALDEHYDE THERETHROUGH.
Claim 2
Independent Claim
54 words
THE METHOD OF POLYMERIZATION OF FORMALDEHYDE BY VIBRATION CONSISTING OF: FIRST INTRODUCING FORMALDEHYDE IN VAPOR PHASE AND A CATALYST CONSISTING OF NITROGENOUS MACROMOLECULES INTO A LAYER OF REACTING POWDER IN A REACTOR CHAMBER, WITHDRAWING THE POLYMERIZED FORMALDEHYDE POWDER FROM THE REACTOR CHAMBER AND VIBRATING THE REACTOR CHAMBER DURING THE PASSAGE OF THE FORMALDEHYDE THERETHROUGH.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |