US3253933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass compositions
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1961-12-18
•
Granted: 1966-05-31
•
Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Godron Yves Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
C; C05; C05D; C05D9/00; C05D9/02; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
PHOSPHATE GLASS CONSISTING ESSENTIALLY OF A TERNARY COMPOSITION OF ALKALI METAL OXIDE, P2O5 AND AL2O3, IN THE PROPORTIONS OF ALKALI METAL OXIDE 40 TO 50 MOLE PERCENT, P2O5 34.5 TO 50 MOLE PERCENT, AL2O3 10 TO 20 MOLE PERCENT, AND FOR 100 MOLES OF THE BASIC COMPOSITIONS, 2 TO 20 MOLES OF AT LEAST ONE DIVALENT LMETAL OXIDE FROM THE CLASS CONSISTING OF CAO, ZNO, AND MGO, THE MOLECULAR RATIO OF P2O5 TO AL2O3 BEING NOT LESS THAN 1.5 TO 1, THE CONTENT OF AL2O3 BEING LESS THAN 20% BAY WEIGHT OF THE GLASS, AND THE TOTAL AMOUNT OF IMPURITIES BEING LESS THAN 4% OF THE WEIGHT OF THE GLASS.
Claim 2
Dependent Claim
110 words
PHOSPHATE GLASS CONSISTING ESSENTIALLY OF A TERNARY COMPOSITION OF ALKALI METAL OXIDE, P2O5 AND AL2O3, IN THE PROPORTIONS OF ALKALI METAL OXIDE 40 TO 50 MOLE PERCENT, P2O5 34.5 TO 50 MOLE PERCENT, AL2O3 10 TO 20 MOLE PERCENT, AND FOR 100 MOLES OF THE BASIC COMPOSITIONS, 2 TO 20 MOLES OF AT LEAST ONE DIVALENT LMETAL OXIDE FROM THE CLASS CONSISTING OF CAO, ZNO, AND MGO, THE MOLECULAR RATIO OF P2O5 TO AL2O3 BEING NOT LESS THAN 1.5 TO 1, THE CONTENT OF AL2O3 BEING LESS THAN 20% BAY WEIGHT OF THE GLASS, AND THE TOTAL AMOUNT OF IMPURITIES BEING LESS THAN 4% OF THE WEIGHT OF THE GLASS.
References Cited (Backward Citations)
US2732290A
Cited
US1964629A
Cited
GB498049A
Cited
US2227082A
Cited
US2288418A
Cited
US2751312A
Cited
GB728808A
Cited
US2750270A
Cited
US2827393A
Cited
US2920972A
Cited
US2971644A
Cited
GB829774A
Cited
US2866713A
Cited
US2916388A
Cited
US3021941A
Cited
US3029140A
Cited
US3041201A
Cited
US3075637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |