US3272434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nucleating process
Assignee: Individual
•
Filing: 1963-06-03
•
Granted: 1966-09-13
•
Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Albert C Zettlemoyer
- 👤 John J Chessick
- 👤 Tcheurekdjian Noubar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
A; A01; A01G; A01G15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF NUCLEATING CRYSTALLIZATION OF A HYDROGEN BONDING CRYSTAL FROM A GASEOUS MEDIUM, WHICH COMPRISES SEEDING THE MEDIUM WITH PARTICLES IN A SIZE RANGE BETWEEN 0.01 AND 10 MICRONS CONSISTING OF AN INORGANIC SUBSTRATE AND A PARTIAL LAYER ON THE SURFACE THEREOF OF A DIFFERENT MATERIAL, FORMING PREDOMINATELY HYDROPHOBIC SITES, AND HYDROPHILIC SITES ON THE SURFACE WHICH OCCUPY FROM 5-40% OF THE SURFACE AREA, UNITL CYRSTALS FORM,
Claim 2
Independent Claim
68 words
A METHOD OF NUCLEATING CRYSTALLIZATION OF A HYDROGEN BONDING CRYSTAL FROM A GASEOUS MEDIUM, WHICH COMPRISES SEEDING THE MEDIUM WITH PARTICLES IN A SIZE RANGE BETWEEN 0.01 AND 10 MICRONS CONSISTING OF AN INORGANIC SUBSTRATE AND A PARTIAL LAYER ON THE SURFACE THEREOF OF A DIFFERENT MATERIAL, FORMING PREDOMINATELY HYDROPHOBIC SITES, AND HYDROPHILIC SITES ON THE SURFACE WHICH OCCUPY FROM 5-40% OF THE SURFACE AREA, UNITL CYRSTALS FORM,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |