US3499736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray or gamma ray use in control of crystal diameter
Assignee: US Philips Corp
•
Filing: 1966-10-05
•
Granted: 1970-03-10
•
Expires: 1986-10-05
Abstract
No abstract record available.
Inventors
- 👤 Gooitzen Zwanenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:35
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/20; C30B15/22; C30B15/26; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1004; Y10T117/1008; Y10T117/1012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF PULLING CRYSTALS FROM A MELT IN A CRUCIBLE, IN WHICH THE DIAMETER OF THE GROWING CRYSTAL IS CONTROLLED, CHARACTERIZED IN THAT THE DIAMETER OF THE GROWING PORTION OF THE CRYSTAL IS CONTROLLED RESPONSIVE TO X-RAYS OR GAMMA RADIATION PASSING THROUGH THE WALL OF
Claim 2
Independent Claim
46 words
A METHOD OF PULLING CRYSTALS FROM A MELT IN A CRUCIBLE, IN WHICH THE DIAMETER OF THE GROWING CRYSTAL IS CONTROLLED, CHARACTERIZED IN THAT THE DIAMETER OF THE GROWING PORTION OF THE CRYSTAL IS CONTROLLED RESPONSIVE TO X-RAYS OR GAMMA RADIATION PASSING THROUGH THE WALL OF
References Cited (Backward Citations)
US3011055A
Cited
US3001070A
Cited
US3265470A
Cited
US3046379A
Cited
US3190727A
Cited
US2992311A
Cited
US3372276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |