Patent US3954656A successfully refreshed from Google Patents.
US3954656A
Expired / Lapsed
US
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Laser glasses with high damage threshold and method of making such glasses
Assignee: American Optical Corp
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Filing: 1974-06-03
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Granted: 1976-05-04
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Expires: 1994-06-03
Abstract
Abstract Laser glasses having high resistance to self-damage during operation are formed in all ceramic melting units, in the presence of a fining agent to eliminate the formation of metallic inclusions and semi-conductive inclusions and using base glass compositions with reduced tendency toward microphase separation and devitrification. The major ingredients of the glass batches include silicon dioxide, alkali and alkaline earth nitrates, carbonates and fluorides. The method involves introducing oxidizing compounds into the reaction mixture in a sufficient amount that during the reaction and fining phase, oxidizing conditions are maintained throughout the entire volume of the glass melt.
Inventors
- 👤 Emil W. Deeg
- 👤 Robert E. Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:26
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/095
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 64.04 weight percent
K.sub.2 O 18.79 weight percent
Na.sub.2 O 2.02 weight percent
BaO 9.09 weight percent
Al.sub.2 O.sub.3
1.01 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
3.03 weight percent.
Claim 2
Dependent Claim
43 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 64.04 weight percent
K.sub.2 O 18.79 weight percent
Na.sub.2 O 2.02 weight percent
BaO 9.09 weight percent
Al.sub.2 O.sub.3
1.01 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
3.03 weight percent.
Claim 3
Dependent Claim
43 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 62.02 weight percent
K.sub.2 O 18.79 weight percent
Na.sub.2 O 2.02 weight percent
BaO 9.09 weight percent
Al.sub.2 O.sub.3
1.01 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
5.05 weight percent.
Claim 4
Dependent Claim
43 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 62.02 weight percent
K.sub.2 O 18.79 weight percent
Na.sub.2 O 2.02 weight percent
BaO 9.09 weight percent
Al.sub.2 O.sub.3
1.01 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
5.05 weight percent.
Claim 5
Dependent Claim
37 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 52.53 weight percent
CaO 15.15 weight percent
MgO 8.08 weight percent
Al.sub.2 O.sub.3
18.18 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
4.04 weight percent
Claim 6
Dependent Claim
37 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 52.53 weight percent
CaO 15.15 weight percent
MgO 8.08 weight percent
Al.sub.2 O.sub.3
18.18 weight percent
B.sub.2 O.sub.3 2.02 weight percent
Nd.sub.2 O.sub.3
4.04 weight percent
Claim 7
Dependent Claim
31 words
A laser glass comprised of the following metal compounds: SiO.sub.2 51.52 weight percent
CaF.sub.2 15.15 weight percent
MgO 11.11 weight percent
Al.sub.2 O.sub.3
17.17 weight percent
Nd.sub.2 O.sub.3
5.05 weight percent.
Claim 8
Dependent Claim
31 words
A laser glass comprised of the following metal compounds: SiO.sub.2 51.52 weight percent
CaF.sub.2 15.15 weight percent
MgO 11.11 weight percent
Al.sub.2 O.sub.3
17.17 weight percent
Nd.sub.2 O.sub.3
5.05 weight percent.
Claim 9
Dependent Claim
37 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 60.30 weight percent
Li.sub.2 O 3.52 weight percent
CaO 10.05 weight percent
MgO 5.02 weight percent
Al.sub.2 O.sub.3
17.09 weight percent
Nd.sub.2 O.sub.3
4.02 weight percent.
Claim 10
Dependent Claim
37 words
A laser glass comprised of the following metal oxide compositions: SiO.sub.2 60.30 weight percent
Li.sub.2 O 3.52 weight percent
CaO 10.05 weight percent
MgO 5.02 weight percent
Al.sub.2 O.sub.3
17.09 weight percent
Nd.sub.2 O.sub.3
4.02 weight percent.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |