Patent US3689619A successfully refreshed from Google Patents.
US3689619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous granulation of trioxane
Assignee: Individual
•
Filing: 1970-04-03
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Granted: 1972-09-05
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Expires: 1990-04-03
Abstract
Abstract Method of granulating trioxane in which molten trioxane containing small quantities of water is contacted with a cold surface.
Inventors
- 👤 Joern Borchmann
- 👤 Hugo Fuchs
- 👤 Gert Goeschel
- 👤 Bruno Sander
- 👤 Heinrich Sperber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:22
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04; C07D323/06; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01J; B01J2/00; B01J2/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
28 words
A method as claimed in claim 1 wherein the quantity of water added to the molten trioxane is 10 to 5,000 ppm by weight, based on the trioxane.
Claim 2
Dependent Claim
28 words
A method as claimed in claim 1 wherein the quanTity of water added to the molten trioxane is 10 to 1,000 ppm by weight, based on the trioxane.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1 wherein the quantity of water added to the molten trioxane is 30 to 150 ppm by weight, based on the trioxane.
References Cited (Backward Citations)
CA731203A
Cited
US2697249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |