US2821812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing together thickwalled hollow glass parts
Assignee: US Philips Corp
•
Filing: 1954-04-14
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Granted: 1958-02-04
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Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Vermaas Henricus Gerbra Pieter
- 👤 Heijligers Joris Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:25
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/207; C03B23/217; Y; Y10; Y10S; Y10S269/00; Y10S269/908; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |